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3 years ago

HELP PLEASE!!! I WILL FIVE STAR!!

Mathematics

1 answer:

ivann1987 [24]3 years ago

4 0

Answer:

Step-by-step explanation:

You can't answer c. There is not enough information. Other than there are 14 boys that went, you know nothing about how many went.

Girls going = (3/5) * 20 = 12

Girls not going = 20 - 12 = 8

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What the answer of 4 / 1 1/8

ICE Princess25 [194]

If you mean 4 / (11/8)

= 4 * 8/11
= 32/11

= 2 10/11
= 2.909

4 0

3 years ago

Michmoo Computer Company sells computers and computer parts by mail. The company assures its customers that products are mailed

Anastaziya [24]

Answer: (60.858, 69.142)

Step-by-step explanation:

The formula to find the confidence interval for mean :

$\overline{x}\pm z_c\dfrac{\sigma}{\sqrt{n}}$ , where $\overline{x}$ is the sample mean , $\sigma$ is the population standard deviation , n is the sample size and $z_c$ is the two-tailed test value for z.

Let x represents the time taken to mail products for all orders received at the office of this company.

As per given , we have

Confidence level : 95%

n= 62

sample mean : $\overline{x}=65$ hours

Population standard deviation : $\sigma=18$ hours

z-value for 93% confidence interval: $z_c=1.8119$ [using z-value table]

Now, 93% confidence the mean time taken to mail products for all orders received at the office of this company :-

$65\pm (1.8119)\dfrac{18}{\sqrt{62}}\\\\ 65\pm4.142\\\\=(65-4.142,\ 65+4.142)\\\\= (60.858,\ 69.142)$

Thus , 93% confidence the mean time taken to mail products for all orders received at the office of this company : (60.858, 69.142)

8 0

3 years ago

PLZ HELP WILL MARK BRAINIEST

Lady_Fox [76]

It will be: D

-3 x -5/2 = 15/2, which is 7 1/2

3 0

3 years ago

Could someone please help with this question

Citrus2011 [14]

13/19 = 65/95 that's your answer

5 0

3 years ago

Alex's times for running a mile are Normally distributed with a mean time of

madam [21]

Answer:

.13

Step-by-step explanation:

7 0

3 years ago