Answer
390
Work Step by Step
Multiply the corresponding parts to find:
$=(3 \cdot 1.3) \times (10^7 \cdot 10^{-5})
\\=3.9 \times 10^{7+(-5)}
\\=3.9 \times 10^2$
$\\=390$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
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: 115
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