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.
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 7 - Measurement - Review Exercises - Page 525: 21
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