Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 11 - Test: 21

Answer

He saves 9.12 feet (correct to 3 significant figures)

Work Step by Step

Using Pythagorean Theorem, $20^{2}$ = $(x+8)^{2}$ + $x^{2}$ 2$x^{2}$ + 16x + 64 = 400 $x^{2}$ + 8x - 168 = 0 x = 9.56 (corr. to 3 sig fig) He saves 29.12 - 20 feet
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