A tank holds 100 gallons of water, which drains from a leak at the bottom, causing the tank to empty in 40 minutes. According to Toricelli’s Law, the volume V of water remaining in the tank after t min is given by the function

V= f(t) = 100 (1 - t/40)^2

a.) Find F-1

f^-1(V) =


b.) Find f^-1(11) (Round your answer to one decimal place.)

f^-1(11) =