Answer
27 years
Work Step by Step
The average adult sleeps 8 hours a day. That is one-third of a day. Therefore, a third of every lifetime will be spent sleeping. If the lifetime was 80 years: 80/3 =26.66666. Round to 27 years
Chemistry 12th Edition
by Chang, Raymond; Goldsby, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0078021510
ISBN 13:
978-0-07802-151-0
Chapter 1 - Chemistry: The Study of Change - Questions & Problems - Page 35: 1.106
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