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: 77

Answer

$2.1 \times 10^{-6}$

Work Step by Step

Move the decimal point 3 places to the left to get 2.1. Then, multiply the original power of 10 by $10^{3}$ to retain the original value. $=2.100 \times 10^{-9+3} \\=2.1 \times 10^{-6}$
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