Prealgebra (7th Edition)

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

Chapter 7 - Section 7.6 - Percent and Problem Solving: Interest - Exercise Set: 32

Answer

84 miles

Work Step by Step

perimeter = 4$\times$21 miles = 84 miles
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