Answer
881m
Work Step by Step
All the numbers in 8807m are significant. To round off to the third significant number, you drop off the 7. Since the 7 is 5 or greater, you round the previous number up 1 making 880m -> 881m.
Chemistry: An Introduction to General, Organic, and Biological Chemistry (12th Edition)
by Timberlake, Karen C.
Published by
Prentice Hall
ISBN 10:
0321908449
ISBN 13:
978-0-32190-844-5
Chapter 2 - Section 2.3 - Significant Figures in Calculations - Questions and Problems - Page 33: 2.21d
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