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Based on the information given, the college administrator has collected a sample of n=100 students and obtained the following statistics: Mean: 7.4 hours per week Standard deviation: 3 hours

Why it is?

These statistics can be used to estimate the average amount of time that all students spend on homework assignments during a typical week, as well as to assess the variability in the data.

To estimate the population mean, the sample mean can be used as an unbiased estimator. This means that the sample mean of 7.4 hours per week is likely a good estimate of the true population mean. However, there is always some uncertainty associated with this estimate due to the fact that it is based on a sample.

To quantify the variability in the data, the standard deviation can be used. A standard deviation of 3 hours indicates that there is a relatively large amount of variability in the amount of time that students spend on homework assignments. Some students may spend significantly more or less time on homework than the average of 7.4 hours per week.

Overall, the college administrator can use this information to gain insights into the amount of time that students spend on homework assignments and to make informed decisions based on this knowledge.

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What answers do you need?

Answer:

2

Step-by-step explanation:

Answer:

9 + (-7) = 2

Step-by-step explanation:

The equation of the halfpipe is  Option A , (0, 20); Y equals one over eighty times x squared plus 20.

The equation of the halfpipe is  Y = X²/80 +20.

What is parabola ?

The equation of parabola is given by  

(X-h)² = 4p(Y-k)²

In this case h = 0

So we get  

Y = X²/4P +k

Focus point is (h, p+k) , (p+k) = 40

Hence h, k = (0,20)

P = 40-k = 20

Equation Y = X²/80 +20

Therefore, the equation of the halfpipe is  Y = X²/80 +20

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The complete question is -

A skateboard halfpipe is being designed for a competition. The halfpipe will be in the shape of a parabola and will be positioned above the ground such that its focus is 20 ft above the ground. Using the ground as the x-axis, where should the base of the halfpipe be positioned? Which equation best describes the equation of the halfpipe?

(0, 20); y equals one over eighty times x squared plus 20

(0, 20); y equals one over eighty times x squared minus 20

(0, 10); y equals one over forty times x squared plus 10

(0, 10); y equals one over forty times x squared minus 10

If she moves at a speed of 1.33 miles per minute while walking 4 miles in 3 minutes, she can cover 20 miles in 15 minutes.

A number is divided in division, which is a straightforward procedure. The simplest way to conceptualize it is as a set of objects being distributed among a set of individuals, as in the example given above. In mathematics, division is the process of dividing a number into equal parts and calculating the maximum number of equal parts that may be formed. For instance, dividing 15 by 3 results in the division of 15 into 3 groups of 5 each.

Here,

In 3 minutes, she walk 4 miles,

speed=distance/time

=4/3 miles/minute

distance=speed*time

=4/3*15

=20 miles

She can walk 20 miles in 15 minutes if she walks 4 miles in 3 minutes with a speed of 1.33 miles/minute.

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Answer:

Unit price 12.16 for 4.07 pounds is $2.99 per pound

Unit price 14.99 for 5.11 pounds is $2.93 per pound

The best deal is the 14.99 per 4.11 pounds

Step-by-step explanation:

Unit price 12.16/4.07 = 2.99 rounded to the nearest cent

Unit price 14.99/5.11 = 2.93 rounded to the nearest cent.

Answer:

1) $2.99

2)$2.93

The better buy is the 4.07 pound bag

Step-by-step explanation:

To find the unit price you find the cost per pound

$12.16 : 4.07

? : 1

4.07x = 12.16

x = 2.98771499

$2.99

$14.99 : 5.11

? : 1

5.11x = 14.99

x= 2.9334638

yes u can get help what is it?

Answer:

Yeah i can  help you ,but the picture u have uploaded is blank.

pls upload again.

Step-by-step explanation:

Pls mark BRAINLIEST

Answer:

The answer is B.63

Explanation:

63 is a composite number because a composite numbers is any positive number which is not a "prime number"

Answer: 1, 2, 3, 4 are the consecutive perfect cubes which are added to obtain a sum of 100.

Step-by-step explanation:

Perfect cubes are the numbers that are triple product of same number.

1^3 = 1

2^3 = 8

3^3 = 27

4^3 = 64

1+8+27+64 = 100

Answer: 1, 2, 3, 4 are the consecutive perfect cubes which are added to obtain a sum of 100.

Explanation:

Perfect cubes are the numbers that are triple product of same number.

1^3 = 1

2^3 = 8

3^3 = 27

4^3 = 64

1+8+27+64 = 100

The volume of the solid generated when the region in the first quadrant is: V ≈ 183.78

The disc method, the shell method, and Pappus' centroid theorem can all be used to calculate volume. In many academic disciplines, such as engineering, medical imaging, and geometry, revolution volumes are used. Integration can be used to determine the area of a region bounded by a known curve.

Because we are only revolving the region in the first quadrant, the x values range from x = 0 to x = 3.

Because of the rotation is about the vertical line x = -1, the radius of the cylindrical shell at x is r = x + 1.

The height of the cylindrical shell at x is h = \(x^{2}\)

We can now create our integral equation to find the volume:

\(V =2\pi\int\limits^a_b {rh} \, dx =2\pi\int\limits^3_0 {(1+x)x^2} \, dx \\\\V =2\pi\int\limits^3_0 {(x^{2} +x^3)} \, dx\)

We can now integrate and evaluate to find the volume of the solid.

\(V=2\pi(\frac{x^3}{3}+\frac{x^4}{4} )|^3_0\\\\V = 2\pi(\frac{27}{3}+\frac{81}{4} )\\\\V=\frac{117\pi}{2}\)

V ≈ 183.78

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The given question is incomplete, complete question is:

Find the volume of the solid generated by revolving the region in the first quadrant bounded above by the curve y =\(x^{2}\), below by the x-axis, and on the right by the line x = 3, about the line x = −1

Answer:

1

Step-by-step explanation:

I believe the answers b

Answer:

Correct answer is A. Multiply the first equation by 2 and the second equation by 3.

Step-by-step explanation:

The 99% confidence interval for the true mean length of the manufactured bolt is (2.9177, 3.0823)

Here, we need to construct a 99% confidence interval for population mean (μ) is given by

μ = x + Zα/2 * σ/√n   or    μ = x - Zα/2 * σ/√n

where, μ = population mean

x = sample mean

  = 3 inches

σ = population standard deviation

  = 0.3 inches

Zα/2= z score for a two tailed test at level of significance α = 2.576( for a 99% confidence level)

So, the upper limit would be,

μ = 3 + 1.645 * (0.3/√36)

μ = 3 + 1.646 * (0.3/6)

μ = 3.0823

And the lower limit would be,

μ = 3 - 1.645 * (0.3/√36)

μ = 3 - 1.646 * (0.3/6)

μ = 2.9177

Hence, the 99% confidence interval is (2.9177, 3.0823)

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Answer:

\(a_n=4n-11\)

Step-by-step explanation:

The common difference is \(d=4\) with the first term being \(a_1=-7\), so we can generate an explicit formula for this arithmetic sequence:

\(a_n=a_1+(n-1)d\\a_n=-7+(n-1)(4)\\a_n=-7+4n-4\\a_n=4n-11\)

The statement "nm = x" and the statement "nm = lm = tan(45°) = 1" are true regarding triangle LMN.

In triangle LMN, "nm = x" implies that the length of side NM is equal to the value of x. This suggests that the length of side NM is determined by the specific value of x.

The statement "nm = lm = tan(45°) = 1" is also true. This means that the lengths of sides NM and LM are equal, and they are both equal to 1. Additionally, the tangent of a 45° angle is equal to 1. Therefore, all three quantities in the statement are equal to 1.

Overall, in triangle LMN, the length of side NM is represented by x, and both sides NM and LM have a length of 1.

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Maria's book is 8 days late.

What is linear equation?

An equation is said to be linear if the maximum power of the variable is consistently 1. Another name for it is a one-degree equation. A linear equation with one variable has the conventional form Ax + B = 0. In this case, the variables x and A are variables, while B is a constant.

Let, the late fee for library books is $2. 00 plus 15 cents each day for a book that is late.

Maria's fee for a late book was $3. 20.

As late fee consists of  $2.00 fine plus $0.15D fee or each day:

So,

LF = $2.00 + $0.15D

where D is number of days.

Here late fee for book is $3.20

⇒          $3.20 = $2.00 + $0.15D

$3.20 - $2.00 = $0.15D

             $1.20 = $0.15D

                   D = $1.20/$0.15

                   D = 8

Hence, Maria's book is late for 8 days.

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The single transformation that took place from their starting position to their final destination is (x, y) ⇒ (x + 7, y)

What is transformation?

Transformation is the movement of a point from its initial location to a new location. Types of transformation are rotation, reflection, translation and dilation.

Translation is the movement of a point either up, down, left or right in the coordinate plane.

Hikers walk 3 miles east and then 2 miles north and take a water break. Hence:

(x, y) ⇒ (x + 3, y + 2)

They continue hiking 4 miles east and a final 2 miles south to their destination:

(x, y) ⇒ (x + 3 + 4, y + 2 - 2) ⇒ (x + 7, y)

The single transformation that took place from their starting position to their final destination is (x, y) ⇒ (x + 7, y)

Answer:

From left to right it's square square rectangle.

To convert 4.42 kg into pounds, the starting place in the conversion process is to understand the conversion factor between kilograms and pounds.

The conversion factor between kilograms (kg) and pounds (lbs) is 1 kg = 2.20462 lbs. This means that 1 kilogram is equal to approximately 2.20462 pounds. To convert a given weight in kilograms to pounds, you need to multiply the weight in kilograms by the conversion factor.

In this case, you want to convert 4.42 kg into pounds. The starting place in the conversion process is to use the conversion factor:

4.42 kg * 2.20462 lbs/kg = 9.7314044 lbs

By multiplying the given weight in kilograms (4.42 kg) by the conversion factor (2.20462 lbs/kg), you find that 4.42 kg is approximately equal to 9.7314044 pounds. Therefore, when converting kilograms to pounds, the first step is to apply the appropriate conversion factor by multiplying the weight in kilograms by the conversion factor.

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Answer:

we know that given triangle is right angled triangle.

➢ By using Phythagoras Theorem:-

\( \sf \longrightarrow \: (AC)^2 = (AB)^2 + (BC)^2\)

\( \sf \longrightarrow \: ( \sqrt{80} )^2 = (x)^2 + (8)^2\)

\( \sf \longrightarrow \: 80 = (x)^2 + (8)^2\)

\( \sf \longrightarrow \: 80 \: = x^2 \: + \: 8^2\)

\( \sf \longrightarrow \: 80 \: = x^2 \: + \: 64\)

\( \sf \longrightarrow \: 80 \: - 64 = x^2 \:\)

\( \sf \longrightarrow \: 16 = x^2 \:\)

\( \sf \longrightarrow \: x^2 \: = 16\)

\( \sf \longrightarrow \: x \: = \sqrt{16} \)

\( \sf \longrightarrow \: x \: = 4 \: units \)

Answer:

260 I think?!?!?

Step-by-step explanation:

Distribute

-5(-2)

-5(5)

-5(-2)

=10

=-25

=10

10-25(10)

-25(10)

=-250

10-(-250)

10+250

=260

1 can only be divided by one other integer except1, hence it is not a prime number.

Any natural number higher than 1 that is not the sum of two smaller natural numbers is referred to be a prime number. A composite number is a natural number greater than one that is not prime.

Given this definition, 1 is not a prime number because it can only be divided by one other integer, which is 1 itself.

Based on the explanation above, we can then conclude that 1 is not a prime number.

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The standard normal curve, also known as the standard normal distribution or the z-distribution, is a specific probability distribution that follows a bell-shaped curve. The area under the standard normal curve to the right of z = 3 is approximately 0.0013.

For the area under the standard normal curve to the right of z = 3, we need to calculate the cumulative probability from z = 3 to positive infinity.

The standard normal distribution, also known as the z-distribution, has a mean of 0 and a standard deviation of 1. It is a symmetric bell-shaped curve that represents the distribution of standard scores or z-scores.

Using statistical tables or software, we can find the cumulative probability associated with z = 3, which represents the area under the curve to the left of z = 3.

The cumulative probability for z = 3 is approximately 0.9987.

For the area to the right of z = 3, we subtract the cumulative probability from 1.

Therefore, the area to the right of z = 3 is approximately 1 - 0.9987 = 0.0013.

In conclusion, the area under the standard normal curve to the right of z = 3 is approximately 0.0013.

This means that the probability of randomly selecting a value from the standard normal distribution that is greater than 3 is approximately 0.0013 or 0.13%.

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Answer:

im pretty sure its 7/8

Step-by-step explanation:

Answer:

          It might be 7/8

Step-by-step explanation:

first which one would be greater

3/4 or 5/6 =? once you get you answer which one is greater?

5/6 or 7/8?  so the answer will be .... 7/8

Answer:

5/8=0.625

0.625*40=25

Step-by-step explanation: Hope this helps

Answer: A) B → A: If x + 8 = 11, then x = 3.

In other words, it's the first answer choice.

==================================================

Explanation:

For the general conditional statement \(P \to Q\), the converse of this is \(Q \to P\). We flip the antecedent and conditional. We don't negate any of the pieces.

First, we have to factorize by common factors

So, until this point we have this Now let's factorize the polynomial inside the parenthesis

That would be the final expression. Option A is correct

Answer:

You could solve this equation by referring to the quadratic equation

x=-5+/-√17/2

Step-by-step explanation: