A ball is thrown from an initial height of 1 meter with an initial upward velocity of 15 m/s. The ball's height (in meters) after seconds is given by the following. h=1+15t-5t^2

Find all values of for which the ball's height is 7 meters. Round your answer(s) to the nearest hundredth. (If there is more than one answer, use the "or" button.)