Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 9 - Measurement - 9.1 Measuring Length; The Metric System - Exercise Set 9.1 - Page 584: 54


80.5 km

Work Step by Step

We can convert 50 miles to units of centimeters. $50 ~miles = \frac{50~mi}{1}\times \frac{5280~ft}{1~mi}\times \frac{12~in}{1~ft} \times \frac{2.54~cm}{1~in}$ $50~miles = 8046720~cm$ Since 1 km = 100,000 cm, we need to move the decimal place 5 places to the left to convert from units of cm to units of km. $50~miles = 8046720~cm = 80.5~km$
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