For the years of 1983 to 1990, the number of mountain bike owners m (in millions) in the is can be approximated by the model m=0.337t^2-2.265t+3.962,3

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 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.) t =