Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 3 - Equations and Problem Solving - 3.2 - Equations and Problem Solving - Problem Set 3.2 - Page 106: 43

Answer

t = 9

Work Step by Step

Substitute 652 for A, 400 for P, and 0.07 for r to obtain : 652 = 400 + 400 $\times$ 0.07 $\times$ t 652 = 400 + 28 $\times$ t Subtract 400 from both sides. 652 - 400 = 400 - 400 + 28 $\times$ t 252 = 28 $\times$ t Divide both sides by 28 $\frac{252}{28}$ = t t = 9
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