## Functions Modeling Change: A Preparation for Calculus, 5th Edition

Recall, for a number to be in scientific notation, it must be in the form $a\times 10^b$, where a must be between 1 and 10. Thus, we simplify the expression. If necessary, we change b until the value of a is between 1 and 10. Doing this, we find that the expression becomes: $$3.85\times10^{11}$$ It lies between the 11th and 12th powers of 10.