Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 9 - Measurement - Chapter 9 Test - Page 607: 4


The human thumb is 20 mm wide.

Work Step by Step

Clearly the units km, m, and cm are too large. The human thumb is 20 mm wide. (Since 20 mm = 2 cm, this seems like a reasonable answer.)
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