Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 7 - Measurement - 7.1 Problem Solving with U.S. Measurement Units - 7.1 Exercises: 11

Answer

a.) 2 min b.) 240 min

Work Step by Step

a.) 120 sec = 2 min You are converting from a smaller unit to a larger unit (a second is less than a minute), so divide. Because 60 sec = 1 min, divide by 60 and write the fraction in lowest terms 120 sec= 120 ÷ 60 = 2 min. b.) 4 hr = 240 min You are converting from a larger unit to a smaller unit (an hour is larger than a minute), so multiply. Because 1 hr = 60 min, multiply by 60. 4 hr = 4 * 60 = 240 min.
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