Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 4 - Section 4.6 - Multiplication and Division of Measurements - Exercise - Page 188: 8

Answer

$$35 \ km^2.$$

Work Step by Step

We have $$(5.2\ km)(6.71\ km)=34.892 \ km^2.$$ Now, round this product to two significant digits, which is the accuracy of the least accurate measurement $5.2\ km$. That is, $$(5.2\ km)(6.71\ km)=35 \ km^2.$$
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