I need help with number 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 =

Complete the solution of the equation. find the value of y when x equals -5. -4x - 8y = -52

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g