A ball is thrown from a height of 157 feet with an initial downward velocity of 9 ft/s. The ball's height h (in feet) after t seconds is given by the following. h = 157-9t-16t^2
How long after the ball is thrown does it hit the ground?
Round your answer(s) to the nearest hundredth.
(If there is more than one answer, use the "or" button.)