Elementary Algebra

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

Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapter 4 Review Problem Set: 1

Answer

The top speed of his car is 99.2 miles per hour.

Work Step by Step

To express the speed in miles per hour, we need to multiply it by the ratio that converts kilometers to miles. The ratio that converts kilometers to miles is : $\frac{0.62\ mile}{1\ kilometer}$ $\frac{160\ kilometers}{hour}$ $\times$ $\frac{0.62\ mile}{1\ kilometer}$ = $\frac{160\ \times\ 0.62mile}{hour}$ = $\frac{99.2\ miles}{hour}$ = 99.2 miles per hour The top speed of his car is 99.2 miles per hour.
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