Basic College Mathematics (9th Edition)

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

Chapter 5 - Ratio and Proportion - 5.2 Rates - 5.2 Exercises: 32

Answer

(a) The cost for a wrong number call is: Penny Saver \$0.395 Most Minutes \$0.493 USA Card \$0.26 (b) Using USA Card instead of Most Minutes would save \$0.233 on a wrong number call.

Work Step by Step

(a) The cost for a wrong number call is the sum of the connection fee and the cost per minute. Penny Saver = 0.39 + 0.005 = 0.395 Most Minutes = 0.49 + 0.0025 = 0.493 USA Card = 0.25 + 0.01 = 0.26 (b) Using USA Card instead of Most Minutes would save $0.493 - 0.26 = 0.233$
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