Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - 1.8 Absolute Value Equations and Inequalities - 1.8 Exercises - Page 169: 81

Answer

$25.33\le R_L\le 28.17$ $36.58\le R_E\le 40.92$

Work Step by Step

Step 1. Given $|R_L-26.75|\le1.42$, we have $-1.42\le R_L-26.75\le 1.42$ which gives $25.33\le R_L\le 28.17$ Step 2. Given $|R_E-38.75|\le2.17$, we have $-2.17\le R_E-38.75\le 2.17$ which gives $36.58\le R_E\le 40.92$
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