A model rocket is launched with an initial upward velocity of 156 ft/s. The rocket's height h (in feet) after t seconds is given by the following. h=156t-16t²
Find all values of t for which the rocket's height is 60 feet.
Round your answer(s) to the nearest hundredth.
(If there is more than one answer, use the "or" button.)
t = [] seconds