Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 5 - Section 5.2 - Negative Exponents and Scientific Notation - Exercise Set: 113

Answer

$90,000,000 = 9 \times 10^7$

Work Step by Step

$ 90,000,000$ Step 1: Move the decimal point until the number is between 1 and 10. Step 2: The decimal point is moved 7 places and the original number is 10 or greater, so the count is positive 7. Step 3: The scientific notation is: $90,000,000 = 9 \times 10^7$
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