A ball is thrown from a height of 217 feet with an initial downward velocity of 17 ft/s. The ball's height it (in feet) after 1 seconds is given by the following. h=217-171-16 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.) h ground t = 3.2 seconds ort- seconds X ?