A ball is thrown from an initial height of 2 feet with an initial upward velocity of 30 ft/s. The ball's height h (in feet) after seconds is given by the following.
 h=2+300-1612
 Find all values of t for which the ball's height is 15 feet.
 NA
 Round your answer(s) to the nearest hundredth.
 (If there more than one answer, use the "or" button.)
 1 = seconds
 Х
 ?
 h
 initial
 height
 -ground