Need one more time plz for tomorrow and fast plz

The factorization of 8x3 -125 is (2x-5)(jx2 +kx+25)

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 =

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?