a signal flare is fired into the air from a boat. The height of the flare in feet, t seconds after it is fired is h = -16t^2 + 160t . Find the max. height of the flare, and the time when it reaches its max. height.

Question

a signal flare is fired into the air from a boat. The height of the flare in feet, t seconds after it is fired is h = -16t^2 + 160t .  Find the max. height of the flare, and the time when it reaches its max. height.

isaiah.feynman · Answer

I'm not sure but try finding the vertex of that quadratic equation and see if its right.

anonymous · Answer

x of vertex = -b/2a
y of vertex = f(-b/2a)