Amanda's work and solution to the equation -4k = 20 is shown below. Is she correct? If not, correct her work 4k = 20 44 k = 20 I don't know how to do this ​

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 =