How do I find both the "or" answers? I can only always find just 1 of the answers.

A ball is thrown from a height of156

feet with an initial downward velocity of8 ft/s

The ball's heighth

(in feet) aftert seconds is given by the following.

h=156-8t-16t²

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.)