Evaluate. [2−∣∣−23−2(−15)∣∣]÷(−13) what is the value of the expression? enter your answer as a simplified fraction in the box.

Answers

Answer 1

To evaluate the expression [2−||−23−2(−15)||]÷(−13), we need to follow the order of operations, which is also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

First, let's simplify the absolute value:

||−23−2(−15)|| = ||−23+30|| = ||7|| = 7

Next, let's substitute this simplified value back into the original expression:

[2−7]÷(−13)

Now, we can simplify the expression further:

2−7 = −5

Finally, divide −5 by (−13):

−5÷(−13) = 5/13

Therefore, the value of the expression is 5/13.

The value of the expression:

[2−||−23−2(−15)||]÷(−13) is 5/13.

To evaluate the given expression [2−||−23−2(−15)||]÷(−13), we start by simplifying the absolute value within the expression. We substitute the expression inside the absolute value with its simplified form: −23+30 = 7. The absolute value of 7 is 7. Now, we substitute this value back into the original expression: [2−7]÷(−13). Simplifying further, we have 2−7 = −5. Finally, we divide −5 by (−13) to get 5/13. In conclusion, the value of the given expression is 5/13.

The value of the expression [2−||−23−2(−15)||]÷(−13) is 5/13.

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Related Questions

A person passing near the dam pass greetings to geese swimming in the dam; morning 100 geese. geese replied; we are not 100. we will only be 100 when multiplied by two and you. how many geese are in the dam

Answers

In the morning, the person counts 100 geese. However, the geese respond by saying that they are not 100, but they will only be 100 when multiplied by two and the person. So, there are 50 geese in the dam.

To determine the number of geese in the dam, we need to solve the equation:
2 * number of geese + 1 = 100

By subtracting 1 from both sides of the equation, we get:
2 * number of geese = 99

Next, we divide both sides of the equation by 2 to isolate the number of geese:
number of geese = 99 / 2

Simplifying this equation gives us:
number of geese = 49.5

Since the number of geese cannot be a decimal, we round down to the nearest whole number. Therefore, there are 49 geese in the dam.

However, it is important to note that the question specifies the geese will only be 100 when multiplied by two and the person. This implies that the person is included in the count of 100 geese. Therefore, we add one more to the total.

Hence, the final answer is that there are 50 geese in the dam.

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in a given hypothesis test, the null hypothesis can be rejected at the .10 and .05 level of significance, but cannot be rejected at the .01 level. the most accurate statement about the p-value for this test is: p-value

Answers

The null hypothesis cannot be rejected at the .01 level, it means that the p-value is greater than .01.

In a given hypothesis test, if the null hypothesis can be rejected at the .10 and .05 levels of significance, but cannot be rejected at the .01 level, the most accurate statement about the p-value for this test is that it is greater than .01.

The p-value is the probability of observing the data or more extreme results, assuming that the null hypothesis is true. When the p-value is less than the chosen level of significance (e.g. .05), we reject the null hypothesis.

However, if the p-value is greater than the level of significance (e.g. .01), we fail to reject the null hypothesis.

In this case, since the null hypothesis cannot be rejected at the .01 level, it means that the p-value is greater than .01.

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A medical devices company wants to know the number of hours its MRI machines are used per day. A previous study found a standard deviation of six hours. How many MRI machines must the company find data for in order to have a margin of error of at most 0.70 hour when calculating a 98% confidence interval

Answers

The company must find data for at least 405 MRI machines in order to have a margin of error of at most 0.70 hour when calculating a 98% confidence interval.

To calculate the required number of MRI machines for a margin of error of at most 0.70 hours with a 98% confidence interval, we need to use the formula for sample size determination.
The formula for sample size determination with a given margin of error (E), standard deviation (σ), and confidence level (Z) is:
n = (Z² × σ²) / E²
In this case, the standard deviation (σ) is given as 6 hours.

The margin of error (E) is 0.70 hours.

The confidence level (Z) for a 98% confidence interval is 2.33 (obtained from a standard normal distribution table).
Substituting these values into the formula, we have:
n = (2.33² × 6²) / 0.70²
Simplifying the equation:
n = (5.4289 × 36) / 0.49
n = 198.5184 / 0.49
n ≈ 404.88
Therefore, the company must find data for at least 405 MRI machines in order to have a margin of error of at most 0.70 hour when calculating a 98% confidence interval.

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Fabric that regularly sells for $4.90 per square foot is on sale for 10% off. Write an equation that represents the cost of s
square feet of fabric during the sale. Write a transformation that shows the change in the cost of fabric.

Answers

Answer: Let's write an equation to represent the cost of s square feet of fabric during the sale, considering the 10% discount.

The regular price of the fabric is $4.90 per square foot. The discount reduces the price by 10%. To calculate the sale price, we need to subtract the discount amount from the regular price.

Let's denote the cost of s square feet of fabric during the sale as C(s).

The regular price per square foot is $4.90. Therefore, the discount amount per square foot is (10/100) * $4.90 = $0.49.

The sale price per square foot is the regular price minus the discount amount:

Sale price per square foot = $4.90 - $0.49 = $4.41.

Now, we can write the equation for the cost of s square feet of fabric during the sale:

C(s) = $4.41 * s

This equation represents the cost of s square feet of fabric during the sale.

To show the change in the cost of fabric, we can write a transformation from the regular price to the sale price:

Regular price: $4.90 per square foot

Sale price: $4.41 per square foot

The transformation can be expressed as:

Sale price = (1 - 10/100) * Regular price

This shows that the sale price is obtained by multiplying the regular price by (1 - 10/100), which represents the 10% discount.

Answer:

4.41

Step-by-step explanation:

4.90 *.90 = 4.41

What sampling method could you use to find the percent of residents in your neighborhood who recognize the governor of your state by name? What is an example of a survey question that is likely to yield information that has no bias?

Answers

Use a random sampling method to determine if neighborhood residents recognize the governor by name, minimizing bias and obtaining accurate information without leading or suggestive language.

To find the percent of residents in your neighborhood who recognize the governor of your state by name, you could use a simple random sampling method. This involves selecting a random sample of residents from your neighborhood and asking them if they recognize the governor by name.

An example of a survey question that is likely to yield information that has no bias could be: "Do you recognize the governor of our state by name?" This question is straightforward and does not contain any leading or suggestive language that could influence the respondent's answer. By using such a neutral question, you can minimize bias and obtain more accurate information about the residents' awareness of the governor.

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Gina is at the park from 2:00 to 3:40 everyday. the timeline shows the amount of time she spends warming up, playing soccer and walking two laps until 3:10. on some days she walks extra laps. if it takes her the same amount of time to walk each lap, how many laps does gina walk on the days that she walks until 3:40?

Answers

Based on these scenarios, we see that if Gina walks 3 additional laps, each lap will take her 10 minutes. Therefore, on the days that she walks until 3:40, Gina walks 3 extra laps.

How to calculate the value

From 2:00 to 3:10 (1 hour and 10 minutes), Gina warms up, plays soccer, and walks two laps.

This means that Gina has 1 hour and 10 minutes - the time it takes to warm up, play soccer, and walk two laps - to walk additional laps until 3:40. We need to find out how many laps she can walk in this remaining time.

The remaining time from 3:10 to 3:40 is 30 minutes (3:40 - 3:10 = 0:30).

Since Gina takes the same amount of time to walk each lap, we need to determine the duration of time she spends on each lap. To do this, we divide the remaining time by the number of additional laps:

30 minutes ÷ Number of additional laps = Time per lap

Now, we can check different scenarios by assuming a number of additional laps and calculating the time per lap:

1 additional lap:

30 minutes ÷ 1 additional lap = 30 minutes per lap

2 additional laps:

30 minutes ÷ 2 additional laps = 15 minutes per lap

3 additional laps:

30 minutes ÷ 3 additional laps = 10 minutes per lap

Based on these scenarios, we see that if Gina walks 3 additional laps, each lap will take her 10 minutes. Therefore, on the days that she walks until 3:40, Gina walks 3 extra laps.

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What+percent+of+a+data+set+is+represented+by+the+total+area+under+a+normal+distribution+curve?+100%+75%+25%+50%

Answers

The total area under a normal distribution curve represents 100% of the data set. The normal distribution curve is a continuous probability distribution that is symmetric and bell-shaped.

It is often used to model real-world data. The area under the curve represents the probability of an event occurring within a certain range of values.

To understand this concept better, let's consider an example. Imagine we have a data set that follows a normal distribution, such as the heights of a group of people. The normal distribution curve is bell-shaped, with the mean height in the center and the majority of the data falling within a certain range.

The area under the curve represents the probability of observing a certain range of values. Since the total area under the curve accounts for all possible values in the data set, it corresponds to 100% of the data.

In this case, the correct answer is 100%. This means that the total area under a normal distribution curve represents the entirety of the data set.

To summarize, the total area under a normal distribution curve represents the entire data set, which is equivalent to 100% of the data set.

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Solve each system. 4x-y =-2 -(1/2)x-y = 1

Answers

According to the given statement , By solving the equation we get x = y.

To solve the system of equations:
Step 1: Multiply the second equation by 2 to eliminate the fraction:

-x - 2y = 2.
Step 2: Add the two equations together to eliminate the y variable:

(4x - y) + (-x - 2y) = (-2) + 2.
Step 3: Simplify and solve for x:

3x - 3y = 0.
Step 4: Divide by 3 to isolate x:

x = y.
is x = y.

1. Multiply the second equation by 2 to eliminate the fraction.
2. Add the two equations together to eliminate the y variable.
3. Simplify and solve for x.

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The solution to the system of equations is x = -2/3 and y = -2/3.

To solve the given system of equations:

4x - y = -2   ...(1)
-(1/2)x - y = 1   ...(2)

We can use the method of elimination to find the values of x and y.

First, let's multiply equation (2) by 2 to eliminate the fraction:
-2(1/2)x - 2y = 2

Simplifying, we get:
-x - 2y = 2   ...(3)

Now, let's add equation (1) and equation (3) together:
(4x - y) + (-x - 2y) = (-2) + 2

Simplifying, we get:
3x - 3y = 0   ...(4)

To eliminate the y term, let's multiply equation (2) by 3:
-3(1/2)x - 3y = 3

Simplifying, we get:
-3/2x - 3y = 3   ...(5)

Now, let's add equation (4) and equation (5) together:
(3x - 3y) + (-3/2x - 3y) = 0 + 3

Simplifying, we get:
(3x - 3/2x) + (-3y - 3y) = 3
(6/2x - 3/2x) + (-6y) = 3
(3/2x) + (-6y) = 3

Combining like terms, we get:
(3/2 - 6)y = 3
(-9/2)y = 3

To isolate y, we divide both sides by -9/2:
y = 3 / (-9/2)

Simplifying, we get:
y = 3 * (-2/9)
y = -6/9
y = -2/3

Now that we have the value of y, we can substitute it back into equation (1) to find the value of x:

4x - (-2/3) = -2
4x + 2/3 = -2

Subtracting 2/3 from both sides, we get:
4x = -2 - 2/3
4x = -6/3 - 2/3
4x = -8/3

Dividing both sides by 4, we get:
x = (-8/3) / 4
x = -8/12
x = -2/3

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Shania is working in a clothing store at the freehold raceway mall. she earns $30 per day, plus $5 commision for each sale. write and algebraic equation for the amount of money shania could earn today.

Answers

Shania is working in a clothing store at the freehold raceway mall. she earns $30 per day, plus $5 commision for each sale. Write and algebraic equation for the amount of money Shania could earn today.

Algebraic Equation:The total amount of money that Shania can earn today is the sum of her daily wage of $30 and commission on sales of $5 per sale.The total sales made by Shania can be represented by the variable "s".Therefore, the total amount of money that Shania can earn today can be expressed as:

Shania, who is working in a clothing store at the Freehold Raceway Mall, is earning $30 per day, plus $5 commission for each sale. The equation for the amount of money that she could earn today can be written as the sum of her daily wage and commission on sales made by her. The total sales made by her can be represented by the variable "s."

Therefore, the equation is written as, "Earnings = $30 + $5s." Based on the sales made, the value of "s" can change, which will ultimately change the total earnings.

Shania's earnings will depend on the number of sales she makes, and the total amount of money that she could earn today is the sum of her daily wage and commission on sales.

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Given circle a , angle cbd is 52 degrees and minor arc be is 64 degrees, find the values of the following arcs: minor arc dc and minor arc bc

Answers

To find the values of the minor arcs DC and BC, we can use the properties of angles and arcs in a circle. Since angle CBD is given as 52 degrees and minor arc BE is given as 64 degrees.

Minor arc BC = angle CBD + minor arc BE
Minor arc BC = 52 degrees + 64 degrees
Minor arc BC = 116 degrees
To find the value of minor arc DC, we need to use the fact that the sum of the measures of the minor arcs on a circle is 360 degrees.

Minor arc DC = 360 degrees - minor arc BC
Minor arc DC = 360 degrees - 116 degrees
Minor arc DC = 244 degrees
Therefore, the value of minor arc BC is 116 degrees, and the value of minor arc DC is 244 degrees.

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in a survey of 100 u.s. residents with a high school diploma as their highest educational degree (group 1) had an average yearly income was $35,621. another 120 u.s. residents with a ged (group 2) had an average yearly income of $34,598. the population standard deviation for both populations is known to be $3,510. at a 0.01 level of significance, can it be concluded that u.s. residents with a high school diploma make significantly more than those with a ged? enter the test statistic - round to 4 decimal places.

Answers

The test statistic is approximately 0.8314 (rounded to 4 decimal places).

To determine if U.S. residents with a high school diploma make significantly more than those with a GED, we can conduct a two-sample t-test.
The null hypothesis (H0) assumes that there is no significant difference in the average yearly income between the two groups.

The alternative hypothesis (Ha) assumes that there is a significant difference.

Using the formula for the test statistic, we calculate it as follows:
Test statistic = (x₁ - x₂) / √((s₁² / n₁) + (s₂² / n₂))
Where:
x₁ = average yearly income of group 1 ($35,621)
x₂ = average yearly income of group 2 ($34,598)
s₁ = standard deviation of group 1 ($3,510)
s₂ = standard deviation of group 2 ($3,510)
n₁ = number of observations in group 1 (100)
n₂ = number of observations in group 2 (120)
Substituting the values, we get:
Test statistic = (35621 - 34598) / √((3510² / 100) + (3510² / 120))
Calculating this, the test statistic is approximately 0.8314 (rounded to 4 decimal places).

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n an experiment, a researcher believes that by manipulating variable x he or she can cause changes in variable y. however, variable c is causing all of the change in variable y and is unaffected by variable x. variable c is a

Answers

Variable c is acting as a confounding variable in this experiment. A confounding variable is an extraneous variable that is related to both the independent variable and the dependent variable.

It can influence the results of an experiment and create a false relationship between the independent and dependent variables.

In this case, the researcher initially believed that variable x was causing the changes in variable y, but it turns out that the changes were actually caused by variable c.

To avoid confounding variables, researchers need to carefully design their experiments and control for any potential confounders.

This can be done through randomization, controlling the environment, or using statistical techniques like analysis of covariance.

By doing so, researchers can ensure that any observed changes in the dependent variable are truly due to the manipulation of the independent variable.

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Describe how to make a cut through a roll of cookie dough in the shape of a cylinder to make shape.

Circle

Answers

To make a cut through a roll of cookie dough in the shape of a cylinder to make a circle, you would need to follow these steps:

1. Start with a roll of cookie dough that is in the shape of a cylinder. The dough should be evenly shaped and not too soft or sticky.

2. Take a sharp knife and make sure it is clean and dry. This will help to ensure a smooth and precise cut.

3. Decide on the thickness of the cookie dough circle you want to make. This will determine how wide or narrow your cut should be.

4. Hold the roll of cookie dough firmly in one hand, making sure it doesn't roll away. You may use a cutting board or a flat surface to stabilize the dough if needed.

5. Position the knife perpendicular to the roll of cookie dough, at the point where you want to make the cut. It's important to hold the knife straight to achieve a clean and even circle.

6. Apply gentle and steady pressure while cutting through the dough. Slowly rotate the roll of dough as you cut, maintaining the same angle and pressure to ensure a consistent circle shape.

7. Continue cutting until you have completed a full rotation and have cut through the entire roll of dough.

8. Carefully separate the cut section of dough from the rest of the roll. You should now have a circular piece of cookie dough.

9. If desired, you can repeat the process to make additional circles from the remaining dough.

Remember to handle the cookie dough with care to avoid distorting the shape of the circle. Additionally, make sure to follow any specific instructions or guidelines provided with the cookie dough recipe or packaging.

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A computer store offers a 5 % discount off the list price x for any computer bought with cash, rather than put on credit. At the same time, the manufacturer offers a $ 200 rebate for each purchase of a computer.


b. Write a function g(x) to represent the price after the $ 200 rebate.

Answers

The function g(x) to represent the price after the $200 rebate is g(x) = x - $200.

The function g(x) represents the final price after applying the $200 rebate. To calculate the final price, we subtract the rebate amount from the original price.

The original price is denoted by x. Since the manufacturer offers a $200 rebate for each purchase of a computer, we subtract $200 from the original price to obtain the final price.

Therefore, the function g(x) = x - $200 represents the price after the $200 rebate is applied.

This function can be used to calculate the final price for any given original price x. For example, if the original price is $1000, we can substitute x = $1000 into the function to find g($1000) = $1000 - $200 = $800, indicating that the final price after the rebate would be $800.

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for a data matrix x with n rows and p columns, the number of eigenvalues possible for the covariance matrix of x is .

Answers

The number of eigenvalues possible for the covariance matrix of a data matrix X with n rows and p columns is equal to the smaller of n and p.

1. Start with a data matrix X with n rows and p columns.

2. Compute the covariance matrix of X. The covariance matrix is a symmetric matrix that measures the covariance between pairs of variables in X.

3. The covariance matrix of X will be a square matrix with dimensions p x p.

4. The number of eigenvalues of a matrix is equal to its dimension, counting multiplicities. Since the covariance matrix of X is p x p, it will have p eigenvalues.

5. However, the number of eigenvalues for the covariance matrix is also constrained by the number of observations (n) and the number of variables (p) in X.

6. If n < p, it means that there are more variables than observations. In this case, the maximum number of eigenvalues possible for the covariance matrix is n.

7. On the other hand, if p ≤ n, it means that there are more observations than variables. In this case, the maximum number of eigenvalues possible for the covariance matrix is p.

8. Therefore, the number of eigenvalues possible for the covariance matrix of X is equal to the smaller of n and p.

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Provide the formula would you use to compute the cumulative incidence of stroke in patients classified as hypertensive at baseline.

Answers

To compute the cumulative incidence of stroke in patients classified as hypertensive at baseline, you can use the following formula:
Cumulative Incidence = Number of new cases of stroke in hypertensive patients / Total number of hypertensive patients at baseline


This formula calculates the proportion of hypertensive patients who develop stroke over a given period of time. It is important to assume that the number of new stroke cases and the total number of hypertensive patients are accurately identified and recorded.

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​benny's arcade has video game machines. the average time between machine failures is hours.​ jimmy, the maintenance​ engineer, can repair a machine in hours on average. the machines have an exponential failure​ distribution, and jimmy has an exponential​ service-time distribution.

Answers

Benny’s arcade has video game machines. The average time between machine failures is x hours. Jimmy, the maintenance engineer, can repair a machine in y hours on average.

The machines have an exponential failure distribution, and Jimmy has an exponential service-time distribution.Exponential failure distribution can be used to model the time between machine failures, provided the failures are random. This exponential distribution function has a characteristic that the probability of a machine failing at any point in time is the same, regardless of how long the machine has been in use.

The probability that a machine is operating successfully at a particular point in time is called the reliability of the machine. If R(t) is the reliability of a machine at time t, then the exponential distribution function for failures is given by:R(t) = e−λt where λ is the failure rate per unit time, and t is the time that the machine has been operating since the last failure.The average time between machine failures is given by the inverse of the failure rate, i.e. x = 1/λ.If Jimmy has an exponential service-time distribution,

then the probability that he will take exactly y hours to repair a machine is given by:f(y) = λexp(−λy)For an exponential distribution, the expected value is equal to the inverse of the rate, i.e. E(Y) = 1/λ.In this case, the expected time for Jimmy to repair a machine is y = E(Y) = 1/λ.Since the expected time to repair is y, and the expected time between failures is x, then the expected time to failure is given by:x + y = 1/λ + 1/μwhere μ is the service rate per unit time.Hence, the expected time between failures and repairs.

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Write the inequality that represents the sentence.

The quotient of a number and 12 is no more than 6 .

Answers

The inequality that represents the sentence "The quotient of a number and 12 is no more than 6" is x/12 ≤ 6.

To represent the given sentence as an inequality, we need to translate the words into mathematical symbols.

Let's assume the unknown number as 'x'. "The quotient of a number and 12" can be written as x/12.

The phrase "is no more than" indicates that the expression on the left side is less than or equal to the value on the right side.

The value on the right side of the inequality is 6.

Combining the expressions, we get x/12 ≤ 6, which represents the inequality.

In summary, the inequality x/12 ≤ 6 represents the statement "The quotient of a number and 12 is no more than 6." This means that the value of x divided by 12 must be less than or equal to 6 for the inequality to hold true.

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Verbal


4. How do you find the domain for the composition of

two functions, f ∘ g ?

Answers

Take the intersection of the domains of g and f. This means you find the common values that are allowed in both functions. These common values will form the domain for the composition, f ∘ g.

To find the domain for the composition of two functions, f ∘ g, you need to consider the domains of both functions individually.

The domain of the composition, f ∘ g, is the set of all input values that can be plugged into g and then into f without any issues.

First, determine the domain of g by considering any restrictions on its input values.

Make sure to identify any excluded values, such as those that would result in a division by zero or a negative value inside a square root.

Next, find the domain of f by considering the possible input values it can accept.

Similarly, identify any excluded values based on division by zero or negative values inside square roots.

Finally, take the intersection of the domains of g and f.

This means you find the common values that are allowed in both functions. These common values will form the domain for the composition, f ∘ g.

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Two candles,x and y have different height and thickness. candle x can burn continuously for 13 hour and candles y can burning continuously for 24 hours, if both candles are lighted at the same time, they would have the same length after burning for 9 hours. find the ratio of the original height of candle x to the original height of candle y.

Answers

The ratio of the original height of candle x to the original height of candle y is 13:8. This means that candle x is 13/8 times taller than candle y.

The ratio of the original height of candle x to the original height of candle y can be found by considering their burning rates and the time it takes for them to reach the same length. Based on the given information, candle x burns at a rate of 1/13 of its height per hour, while candle y burns at a rate of 1/24 of its height per hour. After burning for 9 hours, both candles have the same length.

Let's assume the original height of candle x is Hx and the original height of candle y is Hy. Candle x burns at a rate of 1/13 of its height per hour, so after burning for 9 hours, its remaining height would be (1 - 9/13)Hx = (4/13)Hx. Similarly, candle y burns at a rate of 1/24 of its height per hour, so after burning for 9 hours, its remaining height would be (1 - 9/24)Hy = (15/24)Hy.

Given that both candles have the same length after burning for 9 hours, we can equate their remaining heights:

(4/13)Hx = (15/24)Hy

To find the ratio of the original heights, we divide both sides of the equation by Hy:

(4/13)Hx / Hy = (15/24)

Simplifying the equation, we get:

Hx / Hy = (15/24) * (13/4) = 13/8

Therefore, the ratio of the original height of candle x to the original height of candle y is 13:8. This means that candle x is 13/8 times taller than candle y.

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A ferry shuttles people from one side of a river to the other. The speed of the ferry in still water is 25 mi/h . The river flows directly south at 7 mi/h . If the ferry heads directly west, what is the ferry's resulting speed?


b. What formula can you use to find the speed?

Answers

The ferry's resulting speed is approximately 25.96 mi/h.

To find the ferry's resulting speed, we can use the concept of vector addition. The ferry's resulting speed is the vector sum of its speed in still water and the speed of the river.

Let's denote the speed of the ferry in still water as V_ferry and the speed of the river as V_river. In this scenario, the ferry is heading directly west, perpendicular to the southward flow of the river. The resulting speed of the ferry (V_resultant) can be calculated using the Pythagorean theorem:

V_resultant = √(V_ferry^2 + V_river^2)

Substituting the given values, we have:

V_resultant = √(25^2 + 7^2) = √(625 + 49) = √674

The formula used to find the speed is the Pythagorean theorem, which relates the lengths of the sides of a right triangle. In this case, the ferry's speed in still water and the speed of the river act as perpendicular sides, and the resulting speed is the hypotenuse of the triangle.

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What is half of 1 and a half inches

Answers

Answer:

Half of 1 and a half inches is 0.5 and 0.75 inches.

Step-by-step explanation:



Let u = [-5 3], v=[4 -3] , and w=[2 2] . Find the following vectors.

-u-w

Answers

The value of the vector - u - w is [3 -5]

Finding the value of the vectors

From the question, we have the following vector that can be used in our computation:

u = [-5 3], v=[4 -3] , and w=[2 2] .

Using the above as a guide, we have the following:

- u - w = -[-5 3] - [2 2]

So, we have

- u - w = [5 -3] - [2 2]

When evaluated, we have

- u - w = [3 -5]

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In 2020, jimmy "jerry jones" johnson is over 65 years of age and has no dependents. his only income was his salary of $220,500. during the year, he made disbursements of the type that qualify as total allowable itemized deductions of $13,290. what is his standard deduction for 2020?

Answers

Jimmy Johnson's standard deduction for 2020 would be $14,050. The standard deduction is a fixed amount that reduces the taxable income of individuals and families. It is an alternative to itemizing deductions on the tax return.

The standard deduction is provided by the tax authorities as a simplified method to calculate taxable income and reduce the administrative burden for taxpayers. To determine Jimmy Johnson's standard deduction for 2020, we need to consider his filing status and age. Since the question does not mention his filing status, we will assume he is a single taxpayer.

For a single taxpayer who is over 65 years of age, the standard deduction for 2020 is $14,050. This amount is higher than the regular standard deduction because taxpayers who are 65 or older get an additional amount as a "senior" standard deduction.

Therefore, Jimmy Johnson's standard deduction for 2020 would be $14,050.

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a right triangle has a hypotenuse of 65 and one leg that measures 60. what is the length of the thrid side

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the hypotenuse of the right triangle is 65, and one of the legs measures 60. We need to find the length of the third side.

To find the length of the third side, we can use the Pythagorean Theorem, which states that in a right triangle, the sum of the squares of the two legs is equal to the square of the hypotenuse. Therefore:a² + b² = c²where a and b are the lengths of the legs, and c is the length of the hypotenuse.

In this case, we can plug in the values that we know:60² + b² = 65²Simplifying, we get:3600 + b² = 4225Subtracting 3600 from both sides, we get:b² = 625Taking the square root of both sides, we get: b = 25Therefore, the length of the third side is 25 units long.

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A normal distribution has a mean of 143 and a standard deviation of 5. Find the z-score for a data value of 144.

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The z-score for a data value of 144 is 0.2.

To find the z-score for a data value of 144 in a normal distribution with a mean of 143 and a standard deviation of 5, we can use the formula:

z = (x - μ) / σ

where z is the z-score, x is the data value, μ is the mean, and σ is the standard deviation.

Plugging in the values, we get:

z = (144 - 143) / 5

z = 1 / 5

z = 0.2

The z-score measures how many standard deviations a data point is away from the mean. In this case, since the z-score is positive, it means that the data value of 144 is 0.2 standard deviations above the mean.

The z-score helps us determine the relative position of a data point within a distribution, providing a standardized way of comparing values across different normal distributions.

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a station is to be assigned a five letter call sign. If first letter must be an A or an F, how many call signs are possible

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The question asks how many call signs are possible for a station that must have a five-letter call sign, with the first letter being either an A or an F. there are 913,952 possible call signs for the station.


For the first letter, we have 2 options (A or F).

For the remaining four letters, we can use any of the 26 letters of the alphabet.


Therefore, the total number of call signs possible is calculated by multiplying the number of options for each letter:

2 (options for the first letter) * 26^4 (options for the remaining four letters)


Simplifying this equation, we get:

2 * 26^4 = 2 * 26 * 26 * 26 * 26 = 2 * 456,976 = 913,952


So, there are 913,952 possible call signs for the station.

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the graph of f(x) can be compressed vertically and shifted to the right to produce the graph of g(x). if f(x)

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The graph of g(x) is obtained by vertically compressing and right-shifting the graph of f(x).

The graph of g(x) can be obtained by applying a vertical compression and a rightward shift to the graph of f(x). When we compress the graph of f(x) vertically, it means that the values of the y-coordinates of the points on the graph of f(x) are multiplied by a constant factor less than 1. This causes the graph to become narrower.

Additionally, when we shift the graph of f(x) to the right, we are moving all the points on the graph horizontally towards the positive x-axis by a specific amount. This shift changes the x-coordinates of the points while keeping their y-coordinates the same. By applying these transformations, we can obtain the graph of g(x) from the original graph of f(x) with the desired vertical compression and rightward shift.

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In 2008, there were about 1.5 billion Internet users. That number is projected to grow to 3.5 billion in 2015 .

e. Explain how you can use your equation from part (d) to verify your answers to parts (b) and (c).

Answers

The equation from part (d) can be used to verify the answers to parts (b) and (c) by plugging in the respective years and checking if the projected number of Internet users aligns with the calculated values.

In part (d), an exponential growth equation was derived to estimate the number of Internet users in a given year based on the initial number of users and the growth rate. Let's denote the number of Internet users in a specific year as N and the corresponding year as t.

The equation from part (d) is:

N = N0 * (1 + r)^(t - t0)

In part (b), the number of Internet users in 2010 was estimated using the growth rate between 2008 and 2015. Let's assume t0 = 2008, N0 = 1.5 billion, t = 2010, and N = estimated number of Internet users in 2010.

By plugging these values into the equation, we can calculate the estimated number of Internet users in 2010:

N = 1.5 * (1 + r)^(2010 - 2008)

Similarly, in part (c), the number of years required for the number of Internet users to reach 5 billion was estimated. Assuming t0 = 2008, N0 = 1.5 billion, N = 5 billion, and t = estimated number of years, we can solve for t using the equation:

5 = 1.5 * (1 + r)^(t - 2008)

By solving these equations, we can verify if the estimated values obtained in parts (b) and (c) match the projected number of Internet users.

By utilizing the exponential growth equation derived in part (d) and plugging in the corresponding values from parts (b) and (c), we can verify the accuracy of the estimated number of Internet users in 2010 and the number of years required to reach 5 billion users. This allows us to compare the projected values to the calculated values and assess the validity of the growth rate assumption. The equation provides a mathematical framework to model and predict the growth of Internet users over time, enabling us to analyze and verify the estimates made in the earlier parts of the problem.

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lindsay bedford works at the baseball cap shop. she is paid $6.50 per hour plus $0.45 for each cap she embroiders.

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It is true that Lindsay Bedford is paid a base hourly wage of $6.50 and an additional $0.45 for each cap she embroiders.

Lindsay Bedford's pay structure is designed to reward her for both her time worked and the quantity of caps she embroiders. The base hourly wage of $6.50 ensures that she receives a fixed amount for her time spent at work, regardless of the number of caps she embroiders.

In addition to the hourly wage, Lindsay receives an extra $0.45 for each cap she embroiders. This additional payment serves as an incentive for her to work efficiently and produce more embroidered caps, as her earnings increase with each cap she completes.

By combining the base hourly wage with the additional payment per cap, Lindsay's compensation reflects both her time-based contribution (hourly wage) and her productivity (embroidered caps). This pay structure encourages her to work efficiently and produce a high volume of embroidered caps, ultimately benefiting both her and the company.

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