students in a statistics class are conducting a survey to estimate the mean number of hours each week that students at their college study. the students collect a random sample of 49 students. the mean of the sample is 12.2 hours. the standard deviation is 1.6 hours. what is the 95% confidence interval for the number of hours students in their college study?

The rocket returns to the ground after 3.15 seconds (approximately) since the other solution corresponds to the time when the rocket is first launched.

To find when the rocket returns to the ground, we need to find the time when the height is zero.

We can solve the equation -16t^2 +100t+2 = 0 by using the quadratic formula:

[tex]t = \frac{-b\ _-^+ \sqrt{(b^2 - 4ac))}}{2a}[/tex]

where a = -16, b = 100, and c = 2.

Substituting these values, we get:

[tex]t = \frac{-100\ _-^+ \sqrt{(100^2 - 4(-16)(2)}}{2(-16)}\\t = \frac{-100\ _-^+ \sqrt{(10000 +128}}{-32}\\\\Now,\ for\ the\ positive\ case,\\\\t = \frac{-100 +100.64}{-32}\\\\t = 0.02 seconds[/tex]

[tex]Now,\ for\ the\ negative\ case,\\t = \frac{-100 -100.64}{-32}\\t = 3.15 seconds[/tex]

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Answer:

C

Step-by-step explanation

the weather usually gets colder in the winter and people usually decorate for Christmas late fall and early winter.

therefore, if there is snow on the ground and Christmas lights on houses its most likely winter.

Check the picture below.

let's find the hypotenuse

[tex]\textit{using the pythagorean theorem} \\\\ c^2=a^2+o^2\implies c=\sqrt{a^2 + o^2} \qquad \begin{cases} c=hypotenuse\\ a=\stackrel{adjacent}{8}\\ o=\stackrel{opposite}{15}\\ \end{cases} \\\\\\ c=\sqrt{8^2+15^2}\implies \implies c=\sqrt{289}\implies c=17 ~\hfill \boxed{\sin( \theta )=\cfrac{\stackrel{opposite}{15}}{\underset{hypotenuse}{17}}}[/tex]

The range of a data set is the difference between the highest and lowest numbers in the set. To find the range for the given set of data, we first need to find the highest and lowest values in the set. From the given set of data, we can see that the minimum value is 3 and the maximum value is 12. Therefore, the range of the given set of data is 12 - 3 = 9.

Hence, the answer is 9.

The volume of this sphere is equal to 4,000 cm³.

In Mathematics and Geometry, the volume of a sphere can be calculated by using this mathematical equation (formula):

Volume of a sphere = 4/3 × πr³

Where:

r represents the radius.

Note: Radius = diameter/2 = 20/2 = 10 cm.

By substituting the given parameters into the formula for the volume of a sphere, we have the following;

Volume of a sphere = 4/3 × 3 × (10)³

Volume of a sphere = 4 × 1000

Volume of a sphere = 4,000 cm³

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The friends can form teams in 6 different ways.

If the four friends want to form two teams, we can count the number of ways they can do this using combinations.

The number of ways to choose two people out of four is given by the combination formula,

C(4,2) = 4! / (2! * (4-2)!) = 6

We can list them as follows, where each team is represented by the letters A and B,

AB  |  CD

AC  |  BD

AD  |  BC

BC  |  AD

BD  |  AC

CD  |  AB

This means that there are 6 different ways the four friends can be split into two teams.

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The probability that the largest of n random samples is greater than the population median M is bounded above by[tex]1 - F(M)^(n-1) \times F(X(n))[/tex].

Assumptions about the population and the sampling method.

Let's assume that the population has a continuous probability distribution with a well-defined median, and that we are taking independent random samples from this population.

Let [tex]X1, X2, ..., Xn[/tex] be the random samples that we take from the population, where n is the sample size.

Let M be the population median.

The probability that the largest of these random samples, denoted by X(n), is greater than M.

Cumulative distribution function (CDF) of the population distribution to calculate this probability.

The CDF gives the probability that a random variable takes on a value less than or equal to a given number.

Let F(x) be the CDF of the population distribution.

Then, the probability that X(n) is greater than M is:

[tex]P(X(n) > M) = 1 - P(X(n) < = M)[/tex]

Since we are assuming that the samples are independent, the joint probability of the samples is the product of their individual probabilities:

[tex]P(X1 < = x1, X2 < = x2, ..., Xn < = xn) = P(X1 < = x1) \times P(X2 < = x2) \times ... \times P(Xn < = xn)[/tex]

For any x <= M, we have:

[tex]P(Xi < = x) < = P(Xi < = M) for i = 1, 2, ..., n[/tex]

Therefore,

[tex]P(X1 < = x, X2 < = x, ..., Xn < = x) < = P(X1 < = M, X2 < = M, ..., Xn < = M) = F(M)^n[/tex]

Using the complement rule and the fact that the samples are identically distributed, we get:

[tex]P(X(n) > M) = 1 - P(X(n) < = M)[/tex]

= [tex]1 - P(X1 < = M, X2 < = M, ..., X(n) < = M)[/tex]

=[tex]1 - [P(X1 < = M) \times P(X2 < = M) \times ... \times P(X(n-1) < = M) \times P(X(n) < = M)][/tex]

[tex]< = 1 - F(M)^(n-1) \times F(X(n))[/tex]

Probability depends on the sample size n and the distribution of the population.

If the population is symmetric around its median, the probability is 0.5 for any sample size.

As the sample size increases, the probability generally increases, but the rate of increase depends on the population distribution.

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Thus, the cost to cover all three faces and base of the triangular prism is $12.24.

An elongated pyramid-like 3D shape is a triangular prism. It features three rectangular faces and two bases. A form must have two similar bases, at least three rectangle-shaped faces, and a consistent cross-section over its whole length in order to qualify as a prism. Your shape is a triangular prism if it is also triangular.

Area of the rectangular base A1 = length * width

A1 : 5*2 = 10 ft²

Area of two rectangles faces A2:

A2: 2*3 + 2*4 = 14 ft²

Area of the two triangles faces A3 = 1/2*base*height

Base of triangle: (x)+(x-5)

Using the Pythagorean theorem:

x²+h² = 3²  

h² = 9-x²   ...eq 1

(5-x)²+h²=4²

h²=16-(5-x)²   ...eq 2

Equating eq 1 and eq 2:

9-x² = 16-(5-x)²

9-x² = 16-25-10x-x²

on solving:

x=1.8

Then,

h²=9-(1.8)²------------ >

h=2.4 ft

Area A3 = (5*2.4)*2/2 = 12 ft²

Total Surface area A = A1+A2+A3

A = 10+14+12

A = 36 ft²

Rate of foil:

$0.34 for 1 ft²

For, A = 36 ft²

rate = 36*0.34

rate = $12.24

Thus, the cost to cover all three faces and base of the triangular prism is $12.24.

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complete question:

The figure shown is a triangular prism. How much would it cost to cover the bases and the other three faces with foil that costs $0.34 per square foot?

The  plant available water capacity  and plant available water for the given density of water and bulk density of soil is equal to 0.09 m and 36mm respectively.

Water content at field capacity = 0.15 kg kg-1

Water content at wilting point = 0.06 kg kg-1

Bulk density of soil = 1250 kg m-3.

Density of water = 1000 kg m-3

The plant available water capacity (PAWC) is ,

PAWC = (water content at field capacity - water content at wilting point)

⇒PAWC = (0.15 kg kg-1 - 0.06 kg kg-1)

⇒PAWC = 0.09 m or 9 cm

Now, PAWC in depth units

= 0.09 m × Bulk density / density of water

= 0.09 × 1250 × 1000

= 112500m

The plant available water capacity (PAWC) of the soil is 112.5 mm

Rooting depth = 40cm

                        = 0.4 m

PAW = PAWC x rooting depth

⇒PAW = 0.09 kg kg-1 x 0.4 m

⇒PAW = 0.036 m

⇒ PAW = 36mm

The plant available water (PAW) for the crop is 36 mm.

Therefore, the  plant available water capacity  and plant available water

is equal to 0.09 m and 36mm.

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The above question is incomplete, the complete question is :

A soil was found to have the following water retention characteristics: Water content at -10 kPa (field capacity) = 0.15 kg kg-1; water content at -1500 kPa (wilting point) = 0.06 kg kg-1. The bulk density was found to be 1250 kg m-3. Assume the density of water to be 1000 kg m-3. 2.1 Calculate the plant available water capacity (PAWC), expressing your results in depth units. [2] 2.2 The crop growing in this field has a rooting depth of 40 cm. Calculate the plant available water (PAW) for this crop?

The distance the tip of the bat travels is equivalent to the length of the arc which is 205 inches

The distance the tip of the bat travels is equal to the length of the arc it sweeps through. To calculate this length, we need to use the formula:

length of arc = (angle / 360) x 2πr

where angle is the central angle in degrees, r is the radius of the circle, and π is a constant approximately equal to 3.14159.

Substituting the given values, we get:

length of arc = (255 / 360) x 2π x 46

length of arc = (0.7083) x 2 x 3.14 x 46

length of arc = 204.6 inches (rounded to two decimal places)

Therefore, the distance the tip of the bat travels is approximately 205 inches to the nearest inch.

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The equation represents that 5,220,000 songs were downloaded in the year 2020. The solution has been obtained by interpreting the equation.

What is interpreting the equation?

When interpreting a function, one must translate the formula or drawn graph's symbols into useful data. This process involves obtaining a statement which represents the function or the equation.

We are given that s (d) represents the number of songs downloaded in a year d.

Now, in the question, we are given an equation as s (2020) = 5,220,000.

So, this equation represents that 5,220,000 songs were downloaded in the year 2020.

Hence, the first option is the correct interpretation of the equation.

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The correct option is - C. The data for the two population of the weight of squirrels have different skews.

Data that produces an uneven, skewed curve on a graph is referred to as skewed data. In statistics, a data set with a normal distribution has a bell-shaped, symmetrical graph. Skewed data, however, has a "tail" on each side of the graph. Two of the most typical skew types are:

For the given  population of the weight of squirrels:

The data for the two population of the weight of squirrels have different skews.

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When the two machines work together, it will take them 114 minutes to produce 5700 cans.

What is the rate?

In mathematics, the rate is a measure of the change in one quantity with respect to another quantity. It is typically expressed as a ratio between the two quantities.

Let's begin by finding the rate of production of each machine.

The newer machine can produce 5700 cans in 190 minutes, so its production rate is:

5700/190 = 30 cans per minute

Similarly, the older machine can produce 5700 cans in 285 minutes, so its production rate is:

5700/285 = 20 cans per minute

When the two machines work together, their combined production rate is:

30 cans per minute + 20 cans per minute = 50 cans per minute

Therefore, to produce 5700 cans, it will take:

5700/50 = 114 minutes

Hence, when the two machines work together, it will take them 114 minutes to produce 5700 cans.

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The numerical measure of linear association is b. correlation coefficient.

The correlation coefficient is a statistical measure that represents the degree of linear relationship between two variables. It takes values between -1 and 1, where -1 represents a perfect negative linear correlation, 0 represents no linear correlation, and 1 represents a perfect positive linear correlation.

A positive correlation means that when one variable increases, the other variable also tends to increase, while a negative correlation means that when one variable increases, the other variable tends to decrease.

The correlation coefficient is calculated using the formula:

[tex]r = (nΣxy - ΣxΣy) / sqrt[(nΣx^2 - (Σx)^2)(nΣy^2 - (Σy)^2)][/tex]

where r is the correlation coefficient, n is the sample size, Σxy is the sum of the products of the corresponding values of x and y, Σx and Σy are the sums of x and y respectively, and Σx^2 and Σy^2 are the sums of the squares of x and y respectively.

In summary, the correlation coefficient is a measure of the strength and direction of the linear association between two variables.

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Scenic Cinemas should offer discounted weekday matinee showings for seniors and continue to focus on weekend showings for their broader audience.

Based on the survey results, it would be wise for Scenic Cinemas to tailor their offerings to accommodate both preferences.

One option would be to offer discounted weekday matinee showings targeted toward seniors. This could incentivize them to visit on weekdays while also offering them a more affordable option. At the same time, Scenic Cinemas could continue to focus on weekend showings to cater to their broader audience.

Another approach would be to offer more diverse programming during the weekdays, such as classic films or independent movies that may appeal more to seniors. This could create a niche for Scenic Cinemas and attract a more loyal customer base.

Ultimately, it's important for Scenic Cinemas to balance the needs of their different audience segments to maximize revenue and customer satisfaction. By offering targeted promotions and programming, they can ensure that both seniors and other moviegoers feel valued and have a reason to visit the theatre.

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In linear equation, 4,000 guest nights did the hotel have during this period.

What is a linear equation in mathematics?

A linear equation is an algebraic equation of the form y=mx+b. m is the slope and b is the y-intercept. The above is sometimes called a "linear equation in two variables" where y and x are variables. 

According to question,

Guest nights = Number of guests × Number of nights

                       = 2,000 × 2

                       = 4,000

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The inverse function r(m), to find the radius of a sphere with mass, m is:

r(m) = ∛(3m/50π)

From the question, we are to determine the inverse function r(m), to find the radius of a sphere with mass, m

From the given information, we have that

m(r) = 50/3 πr³

This can be written as

m = 50/3 πr³

To determine the inversion function r(m), we will simply make r the subject of the above equation

m = 50/3 πr³

Multiply both sides of the equation by 3/50

3/50 × m = 3/50 × 50/3 πr³

3/50 × m = πr³

Divide both sides by π

3/50 × m/π = πr³/π

3/50 × m/π = r³

This can be written as

r³ = 3/50 × m/π

Take the cube root of both sides

r = ∛(3m/50π)

Thus, the inverse function is

r(m) = ∛(3m/50π)

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The probability of getting one even and one odd number when rolling two six-sided, fair dice is 1/4.

To calculate the probability of getting one even and one odd number, we can use the following approach:

So the probability of getting one even and one odd number when rolling two six-sided, fair dice is 1/4 or 0.25.

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The smallest positive integer divisible by 6 and 2 that can be written using at least one 2 and one 6 is 6.

The smallest positive integer that is divisible by both 2 and 6 is their least common multiple (LCM), which is equal to the product of the highest power of each prime factor that appears in the factorization of 2 and 6.

The prime factorization of 2 is simply 2, while the prime factorization of 6 is 2 × 3. The highest power of 2 that appears in the factorization of 6 is just 2 itself, so the LCM of 2 and 6 is 2 × 3 = 6.

We are asked to write this integer using at least one 2 and one 6. We can do this by simply writing 6, which is the LCM of 2 and 6 and is divisible by both of them. Since 6 contains one 2 and one 6, this meets the requirement of the problem. Therefore, the smallest positive integer divisible by 6 and 2 that can be written using at least one 2 and one 6 is 6.

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Answer:

depends on the percentage of vat

The correct option is - D. (1,5). The solution to the system of equations for the given graph is at (1,5).

A collection of values for a variable that simultaneously fulfil each equation is the solution to a system of equations. A system of equations must be solved by identifying all possible sets of variable values that make up the system's solutions.

For the given graph, the solution of the system of equation is obtained as the point where the lines intersect.

The two lines in the graph intersect at the (1,5). Thus, the solution to the system of equations for the given graph is at (1,5).

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Answer:

Step-by-step explanation:

Find the area of the circle with a circumference of

. Write your solution in terms of

.

Area in terms of

: ______

When the factor is tested over four levels. source

(a) The number of replicates used in the experiment is not given in the output.

(b) It the degree of freedom for the factor is 3 and the p-value is less than 0.05.

(c) There is a significant difference between the factor-level means because the p-value is less than 0.05.

(a) The number of replicates used in the experiment is not provided in the given information.

(b) Using the given information, we can fill in the missing values in the ANOVA table as follows:

Source DF SS MS F P-value

Factor 3 ? 110.157 4.42 ?

Error ? ? ? ? ?

Total 31 ? ? ? ?

The missing values can only be determined if the number of replicates used in the experiment is known.

(c) Without the complete ANOVA table, we cannot draw any conclusions about differences in the factor-level means.

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Answer:

To find the greatest possible value of x + y, we need to maximize the values of x and y such that they are still positive integers and satisfy the given equation 18x + 11y = 2020.

We can start by rearranging the equation to solve for y:

11y = 2020 - 18x

y = (2020 - 18x)/11

For y to be a positive integer, 2020 - 18x must be divisible by 11. We can test values of x starting from x = 1 and increasing by 1 until we find the largest possible value of x that satisfies this condition.

When x = 1, 2020 - 18x = 2002, which is divisible by 11. This gives us a value of y = 182/11, which is not a positive integer.

When x = 2, 2020 - 18x = 1984, which is divisible by 11. This gives us a value of y = 180/11, which is not a positive integer.

When x = 3, 2020 - 18x = 1966, which is divisible by 11. This gives us a value of y = 178/11, which is not a positive integer.

When x = 4, 2020 - 18x = 1948, which is divisible by 11. This gives us a value of y = 176/11, which is not a positive integer.

When x = 5, 2020 - 18x = 1930, which is divisible by 11. This gives us a value of y = 174/11, which is not a positive integer.

When x = 6, 2020 - 18x = 1912, which is divisible by 11. This gives us a value of y = 172/11, which is not a positive integer.

When x = 7, 2020 - 18x = 1894, which is divisible by 11. This gives us a value of y = 170/11, which is not a positive integer.

When x = 8, 2020 - 18x = 1876, which is divisible by 11. This gives us a value of y = 168/11, which is not a positive integer.

When x = 9, 2020 - 18x = 1858, which is divisible by 11. This gives us a value of y = 166/11, which is not a positive integer.

When x = 10, 2020 - 18x = 1840, which is divisible by 11. This gives us a value of y = 164/11, which is not a positive integer.

When x = 11, 2020 - 18x = 1822, which is divisible by 11. This gives us a value of y = 162/11, which is not a positive integer.

When x = 12, 2020 - 18x = 1804, which is divisible by 11. This gives us a value of y = 160/11, which is not a positive integer.

When x = 13, 2020 - 18x = 1786, which is divisible by 11. This gives us a value of y = 158/11, which is not a positive integer.

When x = 14, 2020 - 18x = 1768, which is divisible by 11. This gives us a value of y = 156/11, which is not a positive integer.

When x = 15, 2020 - 18x = 1750, which is divisible by 11. This gives us a value of y = 154/11, which is not a positive integer.

When x = 16, 2020 - 18x = 1732, which is divisible by 11. This gives us a value of y = 152/11, which is not a positive integer.

When x = 17, 2020 - 18x = 1714, which is divisible by 11. This gives us a value of y = 150/11, which is not a positive integer.

When x = 18, 2020 - 18x = 1696, which is divisible by 11. This gives us a value of y = 148/11, which is not a positive integer.

When x = 19, 2020 - 18x = 1678, which is divisible by 11. This gives us a value of y = 146/11, which is not a positive integer.

When x = 20, 2020 - 18x = 1660, which is divisible by 11. This gives us a value of y = 144

The answer is B

The internal angles of a triangle have to be 180

IN ΔABC, m∠A=70° and m∠B=35°.

70°+35°+x=180°

105°+x=180°

x=180°-105°

x=75°

Answer B meets the requirements because in ΔPQR m∠P=70° and m∠R=75°

70°+75°+x=180°

145°+x=180°

x=180°-145°

x=35°

The angles of both triangles measure the same

Answer: 85

Step-by-step explanation: i did this question

The given statement "The classical model of decision making assumes that managers have all of the information they need in order to make the optimum decision." is false because it is not necessary that they have all information.

The classical decision-making model assumes that managers have access to all the relevant information, but it does not necessarily assume that they have all the information they need to make the optimum decision.

The model also assumes that the decision-maker is rational and logical, able to identify and evaluate all alternatives and select the best one based on a careful analysis of the pros and cons of each option. However, in practice, managers may not have access to all the information they need, or they may be influenced by biases or external pressures that can lead to suboptimal decision-making.

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Answer:

trapezoid prob i not good at shapes but i thinks its a trapezoid

This shape is simply a quadrilateral. It cannot be square because it does not have four equal sides. It cannot be a rectangle because it does not have two sides that are the same length and because it doesn't have 2 pairs of parallel lines. It cannot be a trapezoid because it does not have 1 pair of parallel lines. It cannot be a triangle because it does not have 3 vertices. Lastly, this shape is not a parallelogram because it does not have 2 pairs of parallel lines.

ANSWER :  QUADRILATERAL

Arc PQ is of length 110 degrees.

Given that a circle's circumference is 360 degrees and that the arc lengths are measured in degrees, we have the equation.

8x - 10 + 6x + 10x + 10 = 360

In order to answer the problem 8x - 10 + 6x + 10x + 10 = 360 for x, we must first combine like terms to simplify the left side of the equation:

8x + 6x + 10x - 10 + 10 = 24x

The equation now reads:

24x = 360

By dividing both sides of the equation by 24, we may isolate x on one side of the equation and solve for it:

24x/24 = 360/24

x = 15

Thus, 15 is the answer to the x problem.

Arc PQ = 8x - 10.

= 8 * 15 - 10

= 110 °

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