Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 7 - Section 7.6 - Radical Equations and Problem Solving - Exercise Set - Page 454: 60

Answer

$\text{approximately } 1,191 \text{ } ft$

Work Step by Step

Let $x$ be the distance from base of tower. Using $a^2+b^2=c^2$ or the Pythagorean Theorem, the conditions of the problem translate to \begin{array}{l}\require{cancel} x^2+2063^2=2382^2 .\end{array} Using the properties of equality, the equation above is equivalent to \begin{array}{l}\require{cancel} x^2=2382^2-2063^2 \\ x^2=5673924-4255969 \\ x^2=1417955 .\end{array} Taking the square root of both sides, the equation above is equivalent to \begin{array}{l}\require{cancel} x=\sqrt{1417955} \\ x\approx1191 .\end{array} Hence, the distance from base of tower, $x$ is $ \text{approximately } 1,191 \text{ } ft .$
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