A baseball player hits a ball toward the outfield. The height h of the ball in feet is modeled by h(t) = -16t2 + 22t + 3, where t is the time in seconds. If no one catches the ball, how long will it stay in the air? (Round to the nearest tenth of a second and enter only the number.)

Answer 1

just solve for t when h=0.
It factors nicely, or your good old quadratic formula should do the trick.

Did you get 1.5 seconds?