Can you make this into a word problem! thank you! s(t) = displacement with respect to time s(t) = 2t^2 + 4t^(1/4)+20 v(t) 4t + t^(-3/4) a(t) = 4 -3/4t^(1/2) If given s(t) = 2t^2 + 4t^(1/4)+20 what is the v(t) and a(t)?

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 =