a. At t=0, the pumpkin is 25 feet above the ground (Plug 0 into the equation and solve)
b. If you plug the equation in a graphing calculator and find the rightmost zero, you get t = 10.15 seconds.
c. The vertex (maximum point) of the graph is (5, 425). Therefore, the pumpkin reaches its maximum height of 425 feet after 5 seconds in the air.