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Advocard [28]
4 years ago
10

A submarine was diving at 77.1 feet per minute. Which number represents the position of the submarine in relation to the surface

after 8 minutes?
A. -85.1 ft.
B. -616.8 ft.
C. 716.8 ft.
D. 85.1 ft.
Mathematics
1 answer:
klasskru [66]4 years ago
5 0

First, Multiply 77.1 by 8 to find how many feet the submarine has dived.

77.1 × 8 = 616.8

Since the question is asking the submarines position "in relation to the surface," this number needs to be negated.

616.8 ⇒ -616.8

<h2>Answer:</h2>

<u>The submarine is at </u><u>-616.80 ft</u><u> in relation to the surface, so </u><u>option B</u><u> is correct.</u>

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Answer:

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Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for population proportion <em>P</em> is:

CI=p\pm z_{\alpha/2}\sqrt{\frac{p(1- p)}{n}}

The information provided is:

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The formula to compute the sample proportion is:

p=\frac{x}{n}

The R codes for the construction of the 95% confidence interval is:

> x=70

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> s=sqrt((p*(1-p))/n)

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> E=qnorm(0.975)*s

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Thus, the 95% confidence interval for the true proportion of university students who use laptop in class to take notes is (0.2839, 0.4161).

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3 years ago
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I think it would be A

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