I need help with this quadratic rocket question ;-;

Question

A model rocket is launched with an initial upward velocity of 175/fts

. The rocket's height h

 (in feet) after t

 seconds is given by the following.

h=175^t-16t^2

Find all values of t

 for which the rocket's height is 85

 feet.Round your answer(s) to the nearest hundredth.

Answer 1

85=-16t^2+175t

t₁ approx. 10.43

t₂ approx. 0.51