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3 years ago

The registrar's office at ACC predicts that 30% of the 6,950 spaces open in various math classes will be filled

Mathematics

1 answer:

Nesterboy [21]3 years ago

7 0

Answer:

a) 70%

b) 4865

Step-by-step explanation:

a) We assume that 100% of spaces are available prior to the first week of registration, so filling 30% will leave 70% available.

b) 70% of 6950 is ...

0.70×6950 = 4865 . . . spaces available after the first week

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Evaluate the expression. 8! − 5!

svp [43]

Answer:

40200

Step-by-step explanation:

(8x7x6x5x4x3x2x1) - (5x4x3x2x1)

Or simply plug 8! - 5! into the calc.

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3 years ago

Read 2 more answers

How do you solve 2^5? Explain using academic vocabulary

anastassius [24]

Answer:

well if its 2*5 then its 10 because you have to count by 5's two times and you'll get 10. I hope this helps. :3

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3 years ago

You are planning a survey of starting salaries for recent computer science majors. In a recent survey by the National Associatio

nydimaria [60]

Answer:

A sample size of 554 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Standard deviation is known to be $12,000

This means that $\sigma = 12000$

What sample size do you need to have a margin of error equal to $1000, with 95% confidence?

This is n for which M = 1000. So

$M = z\frac{\sigma}{\sqrt{n}}$

$1000 = 1.96\frac{12000}{\sqrt{n}}$

$1000\sqrt{n} = 1.96*12$

Dividing both sides by 1000:

$\sqrt{n} = 1.96*12$

$(\sqrt{n})^2 = (1.96*12)^2$

$n = 553.2$

Rounding up:

A sample size of 554 is needed.

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3 years ago

Please help! i need to figure out this xD

Svetach [21]

The answer to this is D or at least that's what I got

6 0

3 years ago

Please hurry Thank you

miskamm [114]

I believe the answer is true.

8 0

3 years ago