Precalculus: Mathematics for Calculus, 7th Edition

by Stewart, James; Redlin, Lothar; Watson, Saleem

Published by Brooks Cole

ISBN 10: 1305071751

ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.7 - Modeling with Equations - 1.7 Exercises - Page 77: 51

Answer

18ft

Work Step by Step

Pythagorean theorem: $(7.5)^{2}$ + $x^{2}$ = $(19.5)^{2}$ 56.25 + $x^{2}$ =380.25 $x^{2}$=324 x=18 (Dimensions are always positive)

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