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olganol [36]
2 years ago
9

A submarine travels 168 miles in 7 hours. At this rate, how many miles will the submarine travel in 2 1/2

Mathematics
1 answer:
Damm [24]2 years ago
3 0

Answer:

Step-by-step explanation:

(168 mi)/(7 hr) = (24 mi)/hr

(2.5 hr) × (24 mi)/hr = 60 mi

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A random variable x is normally distributed with a mean of 100 and a variance of 25. Given that x = 110, its corresponding z- sc
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A random variable x is normally distributed with a mean of 100 and a variance of 25. Given that x = 110, its corresponding z- score is 0.40.

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Explanation: We are given:

Mean, \mu=100,

Variance, \sigma^{2}=25

\therefore\sigma=\sqrt{\sigma^{2}}

                 =\sqrt{25}

                 =5

The z-score formula is given below:

z=\frac{x-\mu}{\sigma}

        =\frac{110-100}{5}

        =\frac{10}{5}

        =2

Therefore, the z-score corresponding x=100 is 2

Therefore, the given z-score = 0.4 is false.


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