4 years ago

What is the area of the composition figure?

Mathematics

1 answer:

Anuta_ua [19.1K]4 years ago

4 0

Answer:

NWM

Step-by-step explanation:

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2 years ago

Karen is going to a book sale. She knows that she will spend no more than $50. Two of the books Karen wants to buy cost $12 each

olganol [36]

Answer: She can by 3 $7.75 books.

Step-by-step explanation:

7.75 times 3= 23.25 so 23.25+24= 47.25 with tax.

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4 years ago

Using elimination solve 4x-y=4 and 7x-3y=-3

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3 years ago

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(5,?) is on the line below. find the other half of the coordinate <br><br> y=2/3x+7

kenny6666 [7]

Y = ²/₃x + 7
y = ²/₃(5) + 7
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3 years ago

In a study of the length of time that students require to earn bachelor’s degrees, 60 students are randomly selected and they ar

Alex787 [66]

Answer: $(4.24,\ 5.36 )$

Step-by-step explanation:

The confidence interval to estimate the population mean is given by :_

$\overline{x}\ \pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 60 , the sample is a large sample (n>30), so we can apply z-test.

Sample mean = $\overline{x}=4.8$

Standard deviation : $\sigma=2.2$

Level of confidence: $1-\alpha=0.95$

$\Rightarrow\ \alpha=0.05$

Then, critical z-value = $z_{\alpha/2}=1.96$

Then, a 95% confidence interval estimate of the population mean will be

$=4.8\ \pm\ (1.96)\dfrac{2.2}{\sqrt{60}}\\\\=4.8\pm0.56=(4.8-11.76, 4.8+11.76)=(4.24,\ 5.36 )$

Hence, the 95% confidence interval to estimate the population mean = $(4.24,\ 5.36 )$ .

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3 years ago