Prealgebra (7th Edition)

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

Chapter 6 - Test: 21

Answer

12.53

Work Step by Step

$\sqrt {157}$ is between $\sqrt {144}=12$ and $\sqrt {169}=13$ Divide by one of the square roots, then average: $157\div12=13.08\overline3$ $(12+13.08\overline3)\div2=12.541\overline6$ Repeat: $157\div12.542=12.518$ $(12.542+12.518)\div2=12.53$
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