Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 5 - Section 5.1 - Exponents and Scientific Notation - Exercise Set: 128

Answer

$3,949,000$ miles

Work Step by Step

We are given that there are $3.949\times10^{6}$ miles of highways, roads, and streets in the United States. Since the exponent is positive, move the decimal 6 places to the right. Note that 6 places to the right will be 3 decimal places past the last digit (9), so we will add 3 zeroes after 9. $3.949\times10^{6}=3,949,000$ miles
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