# Chapter 5 - Exponents and Polynomials - Chapters 1-5 Cumulative Review Problem Set - Page 233: 39

.12

#### Work Step by Step

First, we put the numbers in scientific notation, and then we use the rules of exponents to obtain: $$3 \times 10^{-5} \times 4 \times 10^{3} \\ 12 \times 10^{-5+3} \\ 12 \times 10^{-2} \\ .12$$

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