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3 years ago

12

Martina begins a five at sea level. She dives down 20 feet, and then rises 7 feet. She dives again, going down 9 more feet. How

far below sea level is Martina?

1 answer:

mojhsa [17]3 years ago

4 0

Answer:

<h2>22<em> </em><em>feet</em><em> </em><em>below</em></h2>

Step-by-step explanation:

<h2>Total down 20+9=29</h2><h2>Total up =7</h2><h2>Net = 29-7=22feet</h2>

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Step-by-step explanation:

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4 years ago

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Step-by-step explanation:

We are given a test with a population mean of 75 and standard deviation equal to 16.

Let X = Percentage of scores

Since, X ~ N( $\mu,\sigma^{2}$ )

The z probability is given by;

Z = $\frac{X-\mu}{\sigma}$ ~ N(0,1) where, $\mu$ = 75 and $\sigma$ = 16

So, P(70 < X < 80) = P(X < 80) - P(X <= 70)

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3 years ago