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arlik [135]
3 years ago
8

21. Carmen spent $1.28 for 8 pieces of

Mathematics
2 answers:
Dmitrij [34]3 years ago
7 0

Answer:

2.40

Step-by-step explanation:

krok68 [10]3 years ago
6 0
It would be B. If you divide 1.28 by 8 you get .16. Then you multiply .16 by 15 to get your answer
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A researcher works on a study that has a population standard deviation of 0.73a sample mean of 84.5 and a sample size of 60 .Wha
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Answer:

ME = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

The critical value can be founded in the normal standard distribution table using the value of \alpha/2 =0.025 and we got z_{\alpha/2}=1.96. Replacing the info given we got:

ME = 1.96 \frac{0.73}{\sqrt{60}}= 0.185

Step-by-step explanation:

For this case we have the following info given:

\sigma = 0.73 represent the population deviation

\bar X = 84.5 represent the sample mean

n =60 represent the sample size

And we want to find the margin of error for a confidence level of 95%. So then the significance level would be \alpha=1-0.95 = 0.05 and \alpha/2 =0.025. The margin of error is given by:

ME = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}

The critical value can be founded in the normal standard distribution table using the value of \alpha/2 =0.025 and we got z_{\alpha/2}=1.96. Replacing the info given we got:

ME = 1.96 \frac{0.73}{\sqrt{60}}= 0.185

6 0
4 years ago
Kesha bought a new pair of skis for $450. She made a payment of $120 and got a student discount of $40. Her mother paid 1/2 of t
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She has $145 to left to pay.
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Find the value of sinA in the figure above.
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Answer:

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Step-by-step explanation:

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Answer:

a = \frac{d - c}{b}

Step-by-step explanation:

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     - c        - c

ab = d - c

divide both sides by b

a = \frac{d - c}{b}

I hope this helps!!

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4 years ago
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