At $7\mathrm{.}25$ percent interest, how long does it take to double your money?

Note: Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

Length of time

years

At $7\mathrm{.}25$ percent interest, how long does it take to quadruple your money?

Note: Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

Length of time

years