Thinking Mathematically (6th Edition)

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

Chapter 1 - Problem Solving and Critical Thinking - 1.3 Problem Solving - Exercise Set 1.3: 7

Answer

The unnecessary information in the problem is the amount of money given to the parking attendant. Charge for parking for 5 hours = 4.50

Work Step by Step

Charge of parking for first hour = 2.50 Charge of parking after that = 0.50 per hour Number of hours parked = 10 A.M - 3 P.M = 5 hours Money given to parking attendant = 20 To find out the money he was charged for parking for 5 hours, we don't need the information about how much he gave the parking attendant. Charge for parking for 5 hours = 2.50 + (0.50 x 4) = 2.50 + 2 = 4.50
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