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 - 5.6 Exponents and Scientific Notation - Exercise Set 5.6: 99

Answer

$4 \times 10^{-7}$

Work Step by Step

Convert each number to scientific notation to find: $=\dfrac{8 \times 10^{-5}}{2 \times 10^{2}}$ Divide the corresponding parts to find: $=(8 \div 2) \times (10^{-5} \div 10^{2}) \\=4 \times 10^{-5-2} \\=4 \times 10^{-7}$
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