Write an exponential formula of the form $\displaystyle {f{{\left({t}\right)}}}={a}\cdot{b}^{{t}}$ to represent the following situation. Assume $\displaystyle {t}$ is in years.

An investment of $12,500, triples every 15 years. Round your values to three decimal places.


$\displaystyle {f{{\left({t}\right)}}}$= Preview Question 6