V(t)=175(1-(t/45))^2

Find the inverse V^-1=?

let y = 175(1 - t/45)^2

inverse:
t = 175(1-y/45)^2
t/175 = (1-y/45)^2
± √(t/175) = 1 - y/45

y/45 = 1 ± √(t/175)
y = 45(1 ±√(t/175)