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Murljashka [212]

3 years ago

8

PLEASE HELP!!!!!!

2 answers:

expeople1 [14]3 years ago

6 0

The answer is forty five.

zhenek [66]3 years ago

6 0

If we consider the five members of one team shaking hands with each of the five members of the other team, we can simply count the number of hands the members of one team shake, since this will necessarily count all of the handshakes of the other team. Thus, as each of the five people shakes five hands, this gives <span> 25 handshakes. There are ten basketball players total, and if each shakes hands with two referees, this gives </span><span> 20 more handshakes. Thus, a total of </span><span> 45 handshakes occur.</span>

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Jans account balance is $2800. She pays $750 for rent. Jan wants to go on vacation but she wants to keep a balance of at least $

joja [24]

Answer:

Step-by-step explanation:

$2800 - $750 = $2050

$2050 - $500 = $1550

$750 rent

$500 vacation savings

$1500 spending money

7 0

3 years ago

Read 2 more answers

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the

Vesna [10]

Answer:

A sample size of at least 1,353,733 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.327$ .

You would like to be 98% confident that you esimate is within 0.1% of the true population proportion. How large of a sample size is required?

We need a sample size of at least n.

n is found when M = 0.001.

Since we don't have an estimate for the proportion, we use the worst case scenario, that is $\pi = 0.5$

So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.001 = 2.327\sqrt{\frac{0.5*0.5}{n}}$

$0.001\sqrt{n} = 2.327*0.5$

$\sqrt{n} = \frac{2.327*0.5}{0.001}$

$(\sqrt{n})^{2} = (\frac{2.327*0.5}{0.001})^{2}$

$n = 1353732.25$

Rounding up

A sample size of at least 1,353,733 is required.

5 0

3 years ago

4x – 4 = – 12<br> X = ?<br> What is X ?

maxonik [38]

Answer:

X=-2

Step-by-step explanation:

4x-4=-12

Add 4 on both sides

+4 +4

4x=-8

Divide by 4 on both sides

÷4 ÷4

X=-2

8 0

3 years ago

Read 2 more answers

Can someone help me pls with these?!

geniusboy [140]

Answer:

Justin survey - mean

Pair of numbers - 14 and 15

Range of salaries - can't read, but the lowest number has to be the answer.

Fourth number is 64

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Step-by-step explanation:

3 0

3 years ago

Randy and Sandy have a total of 20 books between them. After Sandy loses three by leaving them on the bus, and some birthday gif

nasty-shy [4]

Answer:

Randy had 13 books an Sandy had 7 books.

Step-by-step explanation:

20 - 3 = 17

30 - 17 = 13

13 x 2 = 26

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Hope this helps! Please mark as brainliest.

3 0

3 years ago