ASAP

Please show working out I will give out brainiest :)

Brent wants to know what is 5 x 1/2

Measures of the angle of r, 31 s (x+4) t (3x+9)

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 =