David was sitting in algebra class tired of completing the square. When Mr. Pole turned and faced the whiteboard to create yet another perfect square trinomial, David slingshotted a rubber band directly at Craig, who ducked just in time. On one shot, the height of the rubber band can be modeled by: h=−16t^2+14t+2 where h is the height in feet above the ground and t is time in seconds. Find the time it takes the rubber band to reach the ground.