Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-6 Ratios, Rates, and Conversions - Practice and Problem-Solving Exercises - Page 121: 44


a. 6.45 b. 20 sq. in.

Work Step by Step

There are 2.54 cm in 1 inch. To find the number of square centimeters in a square inch, square 2.54. $2.54^{2}=6.4516$ To get the number of square inches in 129 square centimeters, divide 129 by the number of square centimeters in 1 inch (6.4516). $129\div 6.4515\approx 20$
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