Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 6 - Review - Page 460: 46



Work Step by Step

$66^2+x^2=86^2$ $4356+x^2=7396$ $x^2=7396-4356$ $x=\sqrt {3040}$ $\sqrt {3040}\approx50$ Divide and find the average to find the approximate solution. $3040\div50=60.8$ $(50+60.8)\div2=55.4$ Repeat to further refine, $3040\div55.4=54.87$ $(55.4+54.87)2=55.14$
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