College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.2: 95

Answer

$2.1\times10^{3}$

Work Step by Step

$$\frac{8.4\times10^{8}}{4\times10^{5}}$$ Regroup like terms then simplify $$=(\frac{8.4}{4})(\frac{10^{8}}{10^{5}})$$ When dividing exponential expressions with the same non-zero base, subtract the exponent of the denominator from the exponent of the numerator. $$=2.1\times10^{(8-5)}$$ $$=2.1\times10^{3}$$
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