Prealgebra (7th Edition)

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

Chapter 6 - Review - Page 461: 47



Work Step by Step

$20^2+20^2=x^2$ $400+400=x^2$ $\sqrt {800}=x$ $\sqrt {800}\approx 30$ Divide and find the average to approximate the solution. $800/div30=26.67$ $(30+26.67)\div2=28.335$ Repeat to further refine. $800\div28.335=28.219$ $(28.219+28.335)\div2=28.277$
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