Basic College Mathematics (9th Edition)

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

Chapter 4 - Decimals - 4.2 Rounding Decimal Numbers - 4.2 Exercises: 39

Answer

(a) 186.0 (b) 763.0

Work Step by Step

(a) Draw a "cut-off" line after the tenths place: "185.9". Next, look at the first number after the cut-off line: "8". If the number is 5 or above, round up to the nearest tenth: "186.0". (b) Draw a "cut-off" line after the tenths place: "763.0". Next, look at the first number after the cut-off line: "4". If the number is 4 or below, round down to the nearest tenth: "763.0" Note: You are rounding to the nearest tenth, so show the "0" in the tenth's place (186.0 and 763.0, not 186 and 763).
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