Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 7 - Measurement - Review Exercises: 21

Answer

mm

Work Step by Step

My thumb is 20 mm wide. As we know the thumb length can be measured in km, m, cm, and mm. If we choose 20 km, 20 m or 20 cm it will be too long for the length of the thumb so 20 mm is the correct choice.
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