An object is thrown upward from the top of an 80ft tower. the hieght h of the object after t seconds is represented by the quadratic equation h=-16t^2+64t+80. after howmant seconds will the object hit the ground

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.