Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 4 - Decimals - 4.3 Adding and Subtracting Decimal Numbers - 4.3 Exercises - Page 289: 49

Answer

$$.50 \ dollars $$

Work Step by Step

We first estimate the difference by rounding the costs to the nearest dollar: $$ =8 \ dollars - 7\ dollars \\ =1 \ dollar$$ The exact value is: $$ 7.49 \ dollars - 6.99 \ dollars \\ = .50 \ dollars $$
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