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Lady bird [3.3K]

3 years ago

6

A library has 9,000 books. During renovations, the library wants to pack them into boxes that hold 10 books each. How many boxes

are needed?

2 answers:

yawa3891 [41]3 years ago

3 0

Answer: 900 boxes

Step-by-step explanation: When you take 9,000 and divide it by the number of books in a box(10) you get 900

swat323 years ago

3 0

You are going to need 900 boxes

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Negative five divided by 5/7

Marrrta [24]

Answer:

-7

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Which of the following statements is not true? a) The standard deviation of the sampling distribution of sample mean = σ/√n b) T

I am Lyosha [343]

Answer:

e) The mean of the sampling distribution of sample mean is always the same as that of X, the distribution from which the sample is taken.

Step-by-step explanation:

The central limit theorem states that

"Given a population with a finite mean μ and a finite non-zero variance σ2, the sampling distribution of the mean approaches a normal distribution with a mean of μ and a variance of σ2/N as N, the sample size, increases."

This means that as the sample size increases, the sample mean of the sampling distribution of means approaches the population mean. This does not state that the sample mean will always be the same as the population mean.

6 0

4 years ago

Assuming Earth to be a sphere of radius 4000 miles, how many miles north of the Equator is City A, if it is 36° north from the E

vredina [299]

Answer:

2513 miles

Explanation:

$\sf Length \ of \ arc = \dfrac{\theta}{360} * 2\pi r$

Here given:

∅ = 36°

radius = 4000 miles

Insert following:

$\sf \rightarrow \dfrac{36}{360} * 2\pi (4000)$

$\sf \rightarrow 800\pi \ \ \ (in \ terms \ of \ \pi )$

$\sf \rightarrow 2513.3 \ \ (rounded \ to \ nearest \ tenth)$

$\sf \rightarrow 2513 \ \ (rounded \ to \ nearest \ mile)$

5 0

2 years ago

The average rate of a printer is 4 seconds per page. At this rate, how many pages will be

Ludmilka [50]

60 divided by 4 is 15 15 multiplied by 3 is 45 pages

3 0

3 years ago

Evaluate the function at the indicated values if possible. If an indicated value is not in the domain, say so.

goldfiish [28.3K]

Answer:

f(-7)=0.

f(2)=-9/5.

f(3) doesn't exist because 3 isn't in the domain of the function.

Step-by-step explanation:

$f(x)=\frac{x+7}{x^2-9}$ is the given function.

We are asked to find:

$f(-7)$

$f(2)$

$f(3)$ .

f(-7) means to replace x in the expression called f with -7:

Evaluate $\frac{x+7}{x^2-9}$ at $x=-7$

$\frac{(-7)+7}{(-7)^2-9}$

$\frac{0}{49-9}$

$\frac{0}{40}$

$0$

So f(-7)=0.

f(2) means to replace x in the expression called f with 2:

Evaluate $\frac{x+7}{x^2-9}$ at $x=2$

$\frac{2+7}{2^2-9}$

$\frac{9}{4-9}$

$\frac{9}{-5}$

$\frac{-9}{5}$

So f(2)=-9/5

f(3) means to replace x in the expression called f with 3:

Evaluate $\frac{x+7}{x^2-9}$ at $x=3$

$\frac{3+7}{3^2-9}$

$\frac{10}{9-9}$

$\frac{10}{0}$

Division by 0 is not allowed so 3 is not in the domain of our function.

5 0

4 years ago