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: 35

Answer

At \$0.175/ounce after the coupon, Brand P is the best buy.

Work Step by Step

After subtracting the coupon savings, find the cost per unit for each brand. Brand G $\frac{(2.39 - 0.60)}{10 ounces}$ = $\frac{1.79}{10 ounces}$ = $\frac{1.79\div10}{10\div10 ounces}$ = $\frac{0.179}{1 ounce}$ = 0.179/ounce Brand K $\frac{3.99}{20.3 ounces}$ = $\frac{3.99\div20.3}{20.3\div20.3 ounces}$ = $\frac{0.197}{1 ounce}$ = 0.197/ounce Brand P $\frac{(3.39 - 0.50)}{16.5 ounces}$ = $\frac{2.89}{16.5 ounces}$ = $\frac{2.89\div16.5}{16.5\div16.5 ounces}$ = $\frac{0.175}{1 ounce}$ = 0.175/ounce
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