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: 8


The diameter of the pine tree is 45.72 centimeters.

Work Step by Step

We need to convert 18 inches to centimeters. To do this, we need to multiply 18 by the ratio that converts inches to centimeters. The ratio that converts inches to centimeters is $\frac{2.54\ centimeters}{1\ inch}$. So, 18 inches $\times$ $\frac{2.54\ centimeters}{1\ inch}$ = 18 $\times$ 2.54 centimeters = 45.72 centimeters. The diameter of the pine tree measures 45.72 centimeters.
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