# Appendix A - Basic Algebra Review - A Exercises - Page A-15: 92

$-15,000,000$

#### Work Step by Step

Step 1: The exponent on $10$ is positive, so multiply $-1.5$ by $10^{7}$. Step 2: This moves the decimal point $7$ places to the right, which means $-1.5\times10^{7}=-15,000,000$.

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