Solve for the unknown number of years in each of the following: $($Do not round intermediate calculations and round your answers to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)10$pointsebookHintPrintReferencesPresent ValueYearsInterest RateFuture Value$$470\%98772012\%1,70417,50018\%275\mathrm{.}67120,60014\%303\mathrm{.}827$