Thinking Mathematically (6th Edition)

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

Chapter 5 - Number Theory and the Real Number System - Chapter Summary, Review, and Test - Review Exercises - Page 336: 121


$2.1 \times 10^3$

Work Step by Step

Write each number in scientific notation to obtain: $=\dfrac{8.4 \times 10^6}{4 \times 10^{3}}$ Divide 8.4 and 4 together and the powers of 10 together to obtain: $=\dfrac{8.4}{4} \times \dfrac{10^6}{10^3} \\=2.1 \times 10^{6-3} \\=2.1 \times 10^3$
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