The height h, in feet, of a projectile t seconds after launch is modeled by the equation h = 32t- 16t^2. How long after does the projectile return to the ground?
hello : the projectile return to the ground when : 32t- 16t² =0 16t (2-8t) = 0 16t = 0 or 2-8t = 0 t = 0 ( refused) or t = 1/4 after 1/4 s the projectile return to the ground
