Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 7 - Measurement - Test - Page 527: 11



Work Step by Step

This page is about 21 cm wide. Length can be measured in m, cm or mm. If we choose 21 m it will very long for the width of the page even 21 mm will be short. So 21 cm is the correct choice.
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