Enter an initial Roth IRA deposit amount:$5000$

Enter an annual percent rate of return:$15$

Value after year $1$: $$5750\mathrm{.}00$

Value after year $2$: $$6612\mathrm{.}50$

Value after year $3$: $$7604\mathrm{.}38$

Value after year $4$: $$8745\mathrm{.}03$

Value after year $5$: $$10056\mathrm{.}79$

It will take $5$ years to double your investment with a $15\%$ APR.