Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 7 - Exponents and Exponential Functions - 7-2 Multiplying Powers With the Same Base - Lesson Check - Page 429: 4


4.0$\times$$10^{4}$ km is the length of the equator

Work Step by Step

Length = $\frac{1.9\times10^{-5}km}{1 penny}$ $\times$ $\frac{2.1\times10^{9}pennies}{1 round}$ = 39900 km = 3.99$\times$$10^{4}$ km = 4.0$\times$$10^{4}$ km
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