Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 1 - Foundations for Algebra - 1-3 Real Numbers and the Number Line - Practice and Problem-Solving Exercises - Page 20: 25


$13$ inches

Work Step by Step

A square with area $160$ square inches will have side lengths that are the square root of the area. This is because, for a square, Area = $s^2$, so $s=\sqrt A$ With an area of $160$ inches squared, $s=\sqrt {160}$ We will use method 2 in the book to estimate the square root. According to a calculator's square root function, $\sqrt {160}\approx12.65$ inches Since $12.65$ is closer to $13$ than to $12$, we round to the nearest integer which is $13$ inches.
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