If you invest $\$100$ per month at an annual return of $15\%$ and kept reinvesting the profits, after:
$19 \text{ years, you would have }$119,000.00$
$ 50 \text{ years, you would have } $9,600,000.00$
$ \text{ 60 years, you would have } $39,200,000.00$
$ \text{ 70 years, you would have } $158,000,000.00$
It is possible to convert this into a formula so I can enter in the year to give me the total, i.e. $10$ years would = ?, $100$ years would =?