A flare is launched straight up with a velocity of 200 feet per second. The function h(t)= 200t−16t^2 models the height h(t)of the flare

Question

A flare is launched straight up with a velocity of 200 feet per  second. The function h(t)= 200t−16t^2 models the height h(t)of the flare
are at time t. How many seconds  will it take for the flare to hit the ground?

Steve · Answer

just solve for t when h(t) = 0.