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2 years ago

14

A taxi hurries with a constant speed of 38 miles per hour. How long will it take to travel a distance of 95 miles? O A. 40 minut

es B. 13 minutes OC. 2.5 hours OD. 1.5 hours

1 answer:

umka2103 [35]2 years ago

5 0

C. 2.5 hours

95 miles/x h = 38 miles/h
x = (95 miles/h)/(38 miles) = 2.5 hours

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We are given the following data-set:

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Population:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

Sum of squares of differences =

0.5625 + 33.0625 + 0.0625 + 52.5625 + 333.0625 + 7.5625 + 430.5625 + 18.0625 = 875.5

$\sigma = \sqrt{\dfrac{875.5}{8}} = 10.46$

$\text{ Population variance} = \sigma^2 = 109.44$

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