CPM Homework Help : APCALC Problem 7-81

Yong Li’s initial deposit of $$1$ has grown to $$5$ in just $2$ years of continuously compounded interest! What is the annual interest rate?

Hint:

$\text{Yield = (initial investment)}\left ( 1+\frac{\text{rate}}{\text{number times compounded per year}} \right )^{\text{length-of-investment}}$

Hint:

Since you cannot 'plug in' ? to the denominator of a fraction, you will need to use a limit to describe this situation.