A projectile is propelled into the air (from ground level) at an initial velocity of 432 ft/sec. Remembering t?

A projectile is propelled into the air (from ground level) at an initial velocity of 432 ft/sec. Remembering that the height of such an object is given by y(t)=-16t^2+vt+y what is the maximum height reached by the object? ___ feet and how long is it in the air? ____ seconds