ValueWarning: A date index has been provided, but it has no associated frequency information and so will be ignored when e.g. forecasting

After considering all the options we conclude that the debut of the 911 and 988 hotlines was for 54 years, which is Option B.

The first 911 emergency call was made in 1968 in Alabama. The 988 hotline is a new national mental health crisis hotline that was mandated by the federal government in October 2020 with an official nationwide start date on July 16, 2022. Therefore, the number of years between the debut of the 911 and 988 hotlines is 54 years.

A hotline refers to a phone line which is provided for  the public so that they can apply it to contact an organization about a particular subject. Hotlines gives people opportunity express their concerns and to obtain information from an organization.
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There are 66,295,011,200 ways for six teachers to each choose two children with no one getting a pair of twins.

The given problem deals with six pairs of non-identical twins and six teachers who need to choose two children each, ensuring that no teacher selects a pair of twins.  

Let's begin by understanding the total number of ways the teachers can choose two children from the twelve available. To do this, we need to find the number of combinations of choosing two children from a set of twelve.

This can be calculated using the formula for combinations:

C(n, r) = n! / (r!(n-r)!)

Here, n represents the total number of items to choose from (in our case, 12 children), and r represents the number of items to be chosen at a time (2 children per teacher).

Substituting the values, we have:

C(12, 2) = 12! / (2!(12-2)!)

            = 12! / (2! * 10!)

            = (12 * 11 * 10!) / (2! * 10!)

            = 12 * 11 / 2

            = 66

Therefore, there are 66 different ways for each teacher to choose two children without any restrictions.

However, we need to account for the fact that no teacher should select a pair of twins. Let's consider the scenario where all six teachers choose two children without any restrictions. In this case, each teacher can choose from the available twelve children. The first teacher has twelve choices, the second teacher has eleven choices (as one child has been already selected), the third teacher has ten choices, and so on.

Using the multiplication principle, we can determine the total number of ways all six teachers can select two children without any restrictions:

Total ways without restrictions = 12 * 11 * 10 * 9 * 8 * 7

Now, let's consider the number of ways that result in a teacher selecting a pair of twins. Since there are six pairs of twins, each teacher has a 1/66 chance of selecting a specific pair of twins. Therefore, we need to subtract the number of ways a teacher can choose a pair of twins from the total ways without restrictions.

Number of ways a teacher can choose a pair of twins = 6 * (12 * 11 * 10 * 9 * 8 * 7) / 66

Finally, to find the number of ways for the six teachers to each choose two children with no one getting a pair of twins, we subtract the number of ways a teacher can choose a pair of twins from the total ways without restrictions:

Number of ways = Total ways without restrictions - Number of ways a teacher can choose a pair of twins

= (12 * 11 * 10 * 9 * 8 * 7) - (6 * (12 * 11 * 10 * 9 * 8 * 7) / 66)

= 66,355,443,200 - (3,991,680 / 66)

= 66,355,443,200 - 60,432,000

= 66,295,011,200

There are 66,295,011,200 ways for six teachers to each choose two children with no one getting a pair of twins.

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Sam needs to study approximately 4.6 hours per week to earn a 4.0 GPA. The answer is (d) 4.6 hours.

We know that Sam wants to earn a 4.0 GPA, and his class attendance hours are fixed at 4. Therefore, we can solve for the number of hours he needs to spend studying to achieve this goal by setting the equation equal to 4.0 and solving for the hours spent studying:

4.0 = (0.50 x hours spent studying) + (0.25 x 4) + (0.25 x 2.75)

4.0 = (0.50 x hours spent studying) + 1 + 0.6875

2.3125 = 0.50 x hours spent studying

hours spent studying = 4.625

The correct option is (d) 4.6 hours.

The complete question is:

Sam wants to improve his GPA. to earn a 4.0 this semester. His prior GPA was a 2.75. Imagine that there is an equation that says his new GPA could be calculated based on the number of hours he spends studying, his class attendance, and his prior GPA. Written as an equation, it is Grade = (0.50 x hours spent studying) + (0.25 x class attendance hours) + (0.25 x prior GPA). Sam plans to attend class for 4 out of 4 hours each week. Use the equation to determine approximately how many hours per week Sam needs to study to earn a 4.0.

Select one:

a. 2.3 hours

b. 4.0 hours

c. 1.7 hours

d. 4.6 hours

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The estimated value of the frequency parameter lambda using the method of moments is approximately 0.20.

To estimate the value of the frequency parameter lambda using the method of moments, we equate the sample mean with the population mean, which is equal to 1/lambda.

The sample mean can be calculated by summing the waiting times and dividing by the sample size:

mean = (2+7+9+1+6+7+7+3+5+2+8+3+4)/13 = 4.92

Therefore, we have:

4.92 = 1/lambda

Solving for lambda, we get:

lambda = 1/4.92

             ≈ 0.20

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The radius of convergence of the power series 12"x" n! n=1 is infinity.To determine the radius of convergence, we use the ratio test.

Let a_n be the nth term of the series, then a_n = 12"x" n! / n. Applying the ratio test, we have:

lim as n approaches infinity of |a_{n+1}/a_n| = lim as n approaches infinity of |12"x" (n+1)! / (n+1)| / |12"x" n! / n|

= lim as n approaches infinity of |12"x"| * (n+1) / n

= |12"x"| * lim as n approaches infinity of (n+1) / n

Since lim as n approaches infinity of (n+1) / n = 1, the limit simplifies to |12"x"|. The ratio test tells us that the series is convergent when |12"x"| < 1 and divergent when |12"x"| > 1. Since |12"x"| is always positive, the series is convergent for all values of x, which means the radius of convergence is infinity.

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A sample size of at least 538 freshmen to estimate the proportion of freshmen who do not visit their advisors regularly with a margin of error of 4% and a confidence level of 95%.

To answer your question, we need to use the formula for sample size calculation for proportion:
n = [(Z-score)^2 * p(1-p)] / E^2

Where:
n = required sample size
Z-score = the critical value for the desired confidence level (95% confidence level corresponds to a Z-score of 1.96)
p = the estimated population proportion (34% or 0.34)
1-p = the complement of p
E = the desired margin of error (4% or 0.04)

Plugging in the values:
n = [(1.96)^2 * 0.34(1-0.34)] / (0.04)^2
Simplifying the equation:
n = [(3.8416) * 0.2244] / 0.0016
n = 537.38

We need a sample size of at least 538 freshmen to estimate the proportion of freshmen who do not visit their advisors regularly with a margin of error of 4% and a confidence level of 95%. Keep in mind that this is just an estimate based on the historical data and assumes that the population proportion has not changed significantly.

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Answer:

The rectangular form of the complex number is -3√2 - 3√2i.

To see why, recall that cos(225°) = -sin(45°) = -√2/2 and sin(225°) = -cos(45°) = -√2/2.

So we have:

6(cos 225 + i sin 225)

= 6(-√2/2 - i√2/2)

= -3√2 - 3√2i

The 3rd (third term )of the sequence with  a₁ = 6 and aₙ = aₙ₋₁ • 2 using Geometric Sequence is 24.

To find the third term of the geometric sequence with a recursive formula, we can use the given formula which is a GP formula:

a₁ = 6

aₙ = aₙ₋₁ • 2

Given

First term (a₁) = 6

Therefore

Second term (a₂) = a₁ • 2

                            = 6 • 2 = 12

Third term (a₃) = a₂ • 2

                        = 12 • 2 = 24

Therefore, the third term of the sequence is 24.

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To find the P-value, we need to find the probability of getting a test statistic less than or equal to the -1.38 under a null hypothesis.

Using a standard normal distribution table or calculator, we find that the area to the left of -1.38 is 0.0844.

Therefore, the P-value is 0.0844.

To decide whether to reject the null hypothesis at a significance level of α = 0.05, we compare the P-value to α. Since the P-value (0.0844) is greater than α (0.05), we fail to reject the null hypothesis. We do not have enough evidence to support the alternative hypothesis at the 0.05 level of significance.

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The probability mass function (p.m.f.) of the random variable X is given by P(X=1) = 6/10, P(X=5) = 3/10, and P(X=10) = 1/10.

The p.m.f. of X can be graphed as a bar graph with the x-axis representing the possible values of X and the y-axis representing the probability of each value. The height of each bar represents the probability of each outcome.

For the given scenario, X can take three possible values: 1, 5, or 10, depending on the color of the chip selected. The p.m.f. of X can be calculated by dividing the number of chips of each color by the total number of chips in the bowl. Thus, P(X=1) = 6/10, P(X=5) = 3/10, and P(X=10) = 1/10.

To graph the p.m.f. of X as a bar graph, we can plot the possible values of X on the x-axis and the probability of each value on the y-axis. For example, the bar for X=1 would have a height of 6/10, the bar for X=5 would have a height of 3/10, and the bar for X=10 would have a height of 1/10. The resulting graph would show the probability of each possible outcome of X and would give a visual representation of the distribution of X.

In the second part of the question, the p.m.f. of X is given by f(x) = (1 + I x-3I)/ 11 , x 1,2,3,4,5. This means that the probability of each outcome of X can be calculated using this formula. For example, f(1) = (1 + I 1-3I)/ 11 = 1/11, f(2) = (1 + I 2-3I)/ 11 = 2/11, and so on.

To graph the p.m.f. of X as a bar graph, we can plot the possible values of X on the x-axis and the probability of each value on the y-axis. We can calculate the height of each bar using the formula f(x). For example, the bar for X=1 would have a height of 1/11, the bar for X=2 would have a height of 2/11, and so on. The resulting graph would show the probability of each possible outcome of X and would give a visual representation of the distribution of X.

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In the schedule of cost of goods sold, the cost of goods available for sale represents the total cost of all goods that were available for sale during a particular period.

The schedule of cost of goods sold is an important financial statement that shows the cost of goods that a company has sold during a particular period. The cost of goods available for sale is a key component of this statement and represents the total cost of all goods that were available for sale during the period.

The cost of goods available for sale is calculated by adding the beginning inventory to the cost of goods purchased during the period. This calculation gives the total cost of all goods that a company had available for sale during the period.

Once the cost of goods available for sale is determined, the cost of goods sold can be calculated by subtracting the ending inventory from the cost of goods available for sale. This calculation gives the cost of all goods that were sold during the period.

Overall, the schedule of cost of goods sold is an important financial statement that helps companies track their inventory and understand their cost of goods sold. The cost of goods available for sale is a critical component of this statement and represents the total cost of all goods that a company had available for sale during a particular period.

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When a system of equations has infinitely many solutions, it is considered consistent and dependent.

This means that the equations are not contradictory and there are multiple solutions that satisfy both equations. In contrast, an inconsistent system of equations has no solutions and a consistent, independent system has exactly one unique solution.

For the given system of equations y = x + 5 and y = -5x - 1, we can see that both equations can be rearranged to the form y = mx + b, where m represents the slope and b represents the y-intercept. In this case, the slopes are different (-5 and 1) and the y-intercepts are different (-1 and 5). Therefore, the two lines intersect at a single point and the system has only one solution. So, the answer is option 4 - two.

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The deadweight loss in this scenario can be calculated as the difference between the consumer surplus and producer surplus at the equilibrium price. In this case, the equilibrium price is $15.

To calculate the consumer surplus, we first need to calculate the quantity demanded at the equilibrium price, which is qd = 55 – 15 = 40. The consumer surplus can be calculated as the area under the demand curve above the equilibrium price, which is 1/2*(55-15)*40 = $800.

To calculate the producer surplus, we first need to calculate the quantity supplied at the equilibrium price, which is qs = 615 - 15 = 75. The producer surplus can be calculated as the area above the supply curve below the equilibrium price, which is 1/2(15-0)*(75-15) = $900.

The deadweight loss is the difference between the consumer surplus and producer surplus, which is $800 - $900 = -$100. This negative value indicates that there is no deadweight loss in this scenario, and both the consumers and producers are benefiting from the equilibrium price.

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The correct answer option is: B. the IQR remains a 2.

IQR is an abbreviation for interquartile range and it can be defined as a measure of the middle 50% of data values when they are ordered from lowest to highest.

Mathematically, interquartile range (IQR) is the difference between quartile 1 (Q₁) and quartile 3 (Q₃):

IQR = Q₃ - Q₁

Based on the given data set, the following interquartile ranges was calculated by using Microsoft Excel:

Q₃ = 8

Q₁ = 6

Now, the interquartile range (IQR) is given by:

IQR = Q₃ - Q₁

IQR = 8 - 2

IQR = 2

Adding a shoe size of 6 to the data set, the first and third and interquartile ranges remained the same, which implies that the interquartile range (IQR) would remain as two (2).

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The value of t for this problem is 1.997.

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data. It involves the use of methods and techniques to gather, summarize, and draw conclusions from data.

To determine the value of t, we need to use the t-distribution with degrees of freedom (df) equal to n - 1, where n is the sample size.

Since the sample size is 64, the degrees of freedom is 64 - 1 = 63.

Using a t-distribution table or calculator with 63 degrees of freedom and a 95% confidence level, we find that the t-value is approximately 1.997.

Therefore, the value of t for this problem is 1.997.

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The problem involves finding the expected value and variance for the Student t and chi-squared distributions, as well as finding probabilities for certain values of the distributions.

Additionally, the problem requires finding the value of an F distribution with specific degrees of freedom. The expected value for the Student t distribution with v degrees of freedom is 0, and the variance is v/(v-2) when v>2. For the given case with v=21, E(t)=0 and V(t)=21/19=1.1053. The probability of t being greater than 0.859 with 21 degrees of freedom and a significance level of 0.01 is given by t0.01,21 = P(t > 0.859) = 0.1989. The expected value for the chi-squared distribution with v degrees of freedom is v, and the variance is 2v. For the given case with v=9, E(χ2)=9 and V(χ2)=18. The probability of χ2 being greater than 8.343 with 9 degrees of freedom and a significance level of 0.10 is given by χ20.10,9 = 3.325 and P(χ2 > 8.343) = 0.117. The expected value for the F distribution with v1 numerator degrees of freedom and v2 denominator degrees of freedom is v2/(v2-2) when v2>2, and the variance is (2v2^2(v1+v2-2))/((v1(v2-2))^2(v2-4)) when v2>4. For the given case with v1=21 and v2=25, E(F)=1.25 and V(F)=1.9024. The probability of F being less than 0.01 with 21 numerator degrees of freedom and 25 denominator degrees of freedom is F0.01,21,25 = 0.469. To find the value of F0.99,25,21 without using the Distributions tool, we can use the fact that F is the ratio of two independent chi-squared distributions divided by their degrees of freedom, and we can use the inverse chi-squared distribution to find the value. Therefore, F0.99,25,21 = (1/χ2(0.01,21))/(1/χ2(0.99,25)) = 1.5014/0.6793 = 2.211, which is not one of the answer choices provided.

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The gradient vector field of f is a field of vectors that points in the direction of the steepest increase of f at each point in the xy-plane. To find the gradient vector field of f(x, y) = tan(2x − 3y), we need to calculate the partial derivatives of f with respect to x and y.

∂f/∂x = 2sec^2(2x - 3y)
∂f/∂y = -3sec^2(2x - 3y)

The gradient vector field is then given by the vector [2sec^2(2x - 3y), -3sec^2(2x - 3y)]. This field shows the direction and magnitude of the steepest increase of f at each point. The field will be perpendicular to the level curves of f, which are the curves where f is constant. In this case, the level curves are given by the equation tan(2x − 3y) = constant.
To find the gradient vector field of f(x, y) = tan(2x - 3y), we first need to compute the partial derivatives of f with respect to x and y.

1. Calculate the partial derivative with respect to x:
∂f/∂x = (2)(sec^2(2x - 3y))

2. Calculate the partial derivative with respect to y:
∂f/∂y = (-3)(sec^2(2x - 3y))

3. Form the gradient vector field using the partial derivatives:
∇f = (∂f/∂x, ∂f/∂y) = (2sec^2(2x - 3y), -3sec^2(2x - 3y))

The gradient vector field of f(x, y) = tan(2x - 3y) is (∇f) = (2sec^2(2x - 3y), -3sec^2(2x - 3y)).

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Answer:

[tex]\textsf{A.} \quad y=2^x[/tex]

Step-by-step explanation:

From inspection of the given table, we can see that the number of new infections is twice the number of infections recorded for the previous day. Therefore, we can use the exponential function formula to write a function that models the given data.

[tex]\boxed{\begin{minipage}{9 cm}\underline{General form of an Exponential Function}\\\\$y=ab^x$\\\\where:\\\phantom{ww}$\bullet$ $a$ is the initial value ($y$-intercept). \\ \phantom{ww}$\bullet$ $b$ is the base (growth/decay factor) in decimal form.\\\end{minipage}}[/tex]

The initial value is the number of new infections on day 0:

The growth factor is 2, since the number of new infections doubles each day:

Substitute the values of a and b into the formula:

[tex]y=1 \cdot 2^x[/tex]

[tex]y=2^x[/tex]

Therefore, the exponential function that models the data is:

[tex]\boxed{y=2^x}[/tex]

The absolute maximum of f(x) on [3,4] is f(3) = 2 and the absolute minimum is f(4) = -7.The extreme value theorem does guarantee the existence of an absolute maximum and minimum for f(x) on this interval.

The extreme value theorem states that if a function is continuous over a closed interval, then it must have an absolute maximum and an absolute minimum on that interval.

In this case, the function f(x) is continuous over the closed interval [3,4], as it is a square root function and the square root of a non-negative number is always defined.

To find the absolute maximum and minimum of f(x) on [3,4], we need to evaluate f(x) at the endpoints and any critical points in the interval. However, since f(x) is a decreasing function on [3,4], the maximum value of f(x) occurs at the left endpoint x=3 and the minimum value occurs at the right endpoint x=4.

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the expression for x would be:
x = 24 / y.

To determine the expression for x, we need to consider the total amount of oil that needs to be pumped out of the tanker. As given in the question, the tanker can hold 24 tonnes of oil. Therefore, the expression for the total amount of oil that needs to be pumped out is:
Total amount of oil = 24 tonnes
Now, let's consider the rate at which oil can be pumped out of the tanker in cold weather. Let's assume that the tanker can pump out y tonnes of oil in one minute. Therefore, the expression for the amount of oil pumped out in x minutes would be:
Amount of oil pumped out = y * x tonnes
However, we know that the amount of oil pumped out should be equal to the total amount of oil in the tanker, which is 24 tonnes. Therefore, we can write the following equation:
y * x = 24
To find the expression for x, we can rearrange this equation as:
x = 24 / y
So, the expression for x would be:
x = 24 / y
This expression gives us the number of minutes it would take to empty the tanker in cold weather, based on the rate at which oil can be pumped out of the tanker in that weather condition

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The regression analysis can be used to fit a parabola to a set of data and plot the parabola and data to visualize the relationship between x and y. By using regression analysis, we can find the best-fitting parabola and gain insights into the underlying trends in the data.

Regression analysis can be used to fit a parabola to a set of data by finding the coefficients of the quadratic equation y = ax^2 + bx + c that best fit the data. This can be done using least squares regression, where the sum of the squared differences between the predicted values of y and the actual values of y is minimized.

To plot the parabola and the data, we can use a graphing calculator or a spreadsheet program like Excel. First, we input the data points into the spreadsheet and then use the regression analysis tool to find the coefficients a, b, and c that best fit the data. Once we have the coefficients, we can plot the parabola using the equation y = ax^2 + bx + c.

After plotting the parabola, we can overlay the data points to see how well the parabola fits the data. If the parabola fits the data well, the data points should be clustered around the curve of the parabola. If the parabola does not fit the data well, there may be outliers or other factors that are affecting the relationship between x and y.

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Answer:

g = [tex]\frac{4}{3}[/tex]

Step-by-step explanation:

4 - [tex]\frac{1}{12}[/tex] g - 2 = [tex]\frac{3}{2}[/tex] g + 1 - [tex]\frac{5}{6}[/tex] g

multiply through by 12 ( the LCM of 12, 2 and 6 ) to clear the fractions

48 - g - 24 = 18g + 12 - 10g

- g + 24 = 8g + 12 ( subtract 8g from both sides )

- 9g + 24 = 12 ( subtract 24 from both sides )

- 9g = - 12 ( divide both sides by - 9 )

g = [tex]\frac{-12}{-9}[/tex] = [tex]\frac{12}{9}[/tex] = [tex]\frac{4}{3}[/tex]

The range of y when x belongs to the set of real numbers is

y ≥ -4

To find the range of y when x belongs to the set of real numbers, we can consider the shape of the graph of the function

y = x² - 2x - 3.

Plotting the graph shows that the graphs opens upward and the parabola opens upward and the range of y is all real numbers greater than or equal to the y coordinate of the minimum point.

In this case, the range is y ≥ -4.

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Answer:

567.06 ft2

Step-by-step explanation:

Answer:

72.588

or rounded 72.6

Step-by-step explanation:

The probability that the mean weight of a 24-bag case of potato chips is below 10 ounces is approximately 0.

Here,

Let X = weight of potato chips in medium size bag.

The random variable X follows a Normal distribution with mean, μ = 10.2 ounces and standard deviation, σ = 0.12 ounces.

A sample of n = 24 bags of chips is selected.

Compute the probability that the mean weight of these 24 bags is less than 10 ounces as follows:

P (X < 0) = 1 - P(Z < 8.16)

            ≈ 0

Thus, the probability that the mean weight of a 24-bag case of potato chips is below 10 ounces is approximately 0.

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complete question:

The weight of potato chips in a medium-size bag is stated to be 10 ounces the amount that the packaging machine puts in these bags is believed to have a normal model with mean 10.2 and standard deviation 0.12 ounces. What's the probability that the mean weight of a 24-bag case of potato chips is below 10 ounces?

If y follows a chi-squared distribution with v = 10, then its expected value and variance are given by: E(y) = v = 10, Var(y) = 2v = 20. The probability that X^2 exceeds 6.737 is approximately 0.4238.

Now, let X = √y. Then X follows a chi distribution with v = 10 degrees of freedom. We have:

E(X) = E(√y) = √E(y) = √10

Var(X) = Var(√y) = 1/4 Var(y) = 5

To find P(X^2 > 6.737), we can use the definition of the chi-squared distribution. We have:

P(X^2 > 6.737) = P(X > √6.737) + P(X < -√6.737)

The chi distribution is symmetric, so P(X < -√6.737) = P(X > √6.737). Therefore,

P(X^2 > 6.737) = 2P(X > √6.737)

We can standardize X by subtracting its mean and dividing by its standard deviation:

Z = (X - √10) / √5

Then,

P(X > √6.737) = P(Z > (√6.737 - √10) / √5)

Using a standard normal table or calculator, we find that:

P(Z > 0.798) = 0.2119

Therefore,

P(X^2 > 6.737) = 2P(X > √6.737) = 2(0.2119) = 0.4238

So the probability that X^2 exceeds 6.737 is approximately 0.4238.

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The measure of the various angles are:

∠1= 130°

∠3 = 130°

∠5= 50°

∠6= 130°

Lines m and l are the parallel lines and a line 'n' is a transverse intersecting these lines.

m∠2 = 50°

m∠1 + m∠2 = 180° [Linear pair of angles]

m∠1 = 180° - 50°

m∠1 = 130°

m∠3 = m∠1 = 130° [Vertically opposite angles]

m∠3 + m∠5 = 180° [Consecutive interior angles]

m∠5 = 180° - m∠3

       = 180° - 130°

m∠5   = 50°

m∠6 + m∠5 = 180° [Linear pair of angles]

m∠6 = 180° - 50°

m∠6= 130°

Hence,  the measure of the various angles are:

∠1= 130°

∠3 = 130°

∠5= 50°

∠6= 130°

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Full Question:

Although part of your question is missing, you might be referring to this full question:

See the attached image.

Por lo tanto, la tasa de disminución de la temperatura en grados Celsius por día debe ser menor o igual a 10/3 para que la piscina esté abierta el jueves.

Para resolver este problema, necesitamos utilizar la siguiente fórmula:

Temperatura final = Temperatura inicial - tasa de disminución x días

Sea x la tasa de disminución en grados Celsius por día. Entonces, la temperatura alta el jueves fue:

30 - x(3)

Como se menciona en el problema, la piscina está abierta cuando la temperatura alta es mayor de 20 ∘ C20, degrees, start text, C, end text. Por lo tanto, la temperatura alta el jueves debe ser mayor o igual que 20 ∘ C20, degrees, start text, C, end text. Entonces, tenemos la siguiente desigualdad:

30 - x(3) ≥ 20

Resolviendo para x, obtenemos:

x ≤ 10/3

Por lo tanto, la tasa de disminución de la temperatura en grados Celsius por día debe ser menor o igual a 10/3 para que la piscina esté abierta el jueves.

Learn more about Temperatura here:

https://brainly.com/question/23524228

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