## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson

# Chapter 4 - Polynomials - 4.2 Negative Exponents and Scientific Notations - 4.2 Exercise Set - Page 244: 13

#### Answer

positive power of 10

#### Work Step by Step

A leap year occurs every four years. Each year is equivalent to about $60(60)(24)(365.25)=31,471,200$ seconds, so 4 years is equivalent to around 125,884,800 seconds. Since the number of seconds between leap years is more than 125 million seconds, its scientific notation must involve a positive power of 10.

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