Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.7 - Scientific Notation - Exercise Set: 52

Answer

$x=4\times10^{5}$

Work Step by Step

$x=\frac{1.2\times10^{4}}{3\times10^{-2}}$ $x=(\frac{1.2}{3})\times(\frac{10^{4}}{10^{-2}})$ $x=0.4\times10^{4-(-2)}=0.4\times10^{6}$ Write 0.4 in scientific notation. $0.4=4\times10^{-1}$ $x=4\times10^{-1}\times10^{6}=4\times10^{5}$
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