How to solve ratio problem

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

Select the quadratic that has root x = 8 and x = -5

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 =