Appendix A - Questions for Appendix A - Exponential or Scientific Notation - Page A.16: 18b

$$3.7*10^{-4}$$

To solve, move the decimal to the right or left, counting the number of times that you do so, until you get a number that is at least 1 but that is less than 10. If you moved the decimal right, the number of times the decimal is moved will be negative, while moving left yields a positive number. Then, raise 10 to that number. This gives: $$3.7*10^{-4}$$