Chapter 7 - Exponents and Exponential Functions - 7-4 Division Properties of Exponents - Practice and Problem-Solving Exercises - Page 443: 28

=1.5 $\times$ $10^{-6}$

You have $\frac{4.65*10^-{^4}}{3.1 * 10^2}$.Simplify: $\frac{8.4*10^-{^5}}{2 * 10^-{^8}}$ -subtract the exponents- $10^{-4-2}$=$10^{-6}$ $\frac{4.65}{3.1}$ $\times$ $10^{-6}$ -divide the terms- =1.5 $\times$ $10^{-6}$