Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.1 - Ratios and Proportions - Problem Set 4.1 - Page 148: 9


His car can go 150 miles per hour.

Work Step by Step

We need to convert 0.25 miles per 6 seconds into miles per hour. To do this, we multiply 0.25 miles per 6 seconds by the ratio that converts seconds to hours. The ratio that converts seconds to hours is $\frac{3600\ seconds}{1\ hour}$. So, $\frac{0.25\ mile}{6\ seconds}$ $\times$ $\frac{3600\ seconds}{1\ hour}$ = $\frac{900\ miles}{6\ hours}$ = 150 miles per hour.
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