The height h of an arrow in feet is modeled by h(t) = -16t^2 + 63t +4, where t is the time in seconds since the arrow was shot. How long was the arrow in the air?
If the arrow is in the air, then when it hits the ground, h(t)=0. So: 0=-16t²+63t+4 16t²-63t-4=0 (16t+1)(t-4)=0 t= -1/16 or 4 Using the positive result of 4, we get t=4 seconds as the time the arrow was in the air ☺☺☺☺
