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$.,32\mathrm{.}16.)$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$.,32\mathrm{.}16.)$