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: 12

Answer

a.) 3 hr. b.) 300 sec

Work Step by Step

a.) 180 min = 3 hr You are converting from a smaller unit to a larger unit (a minute is less than a second), so divide. Because 60 min = 1 hr, divide by 60 and write the fraction in lowest terms 180 min = 180 ÷ 60 = 3 hr. b.) 5 min = 300 sec You are converting from a larger unit to a smaller unit (a minute is larger than a second), so multiply. Because 1 min = 60 sec, multiply by 60. 5 min = 5 * 60 = 300 sec.
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