HELP I NEED HELP ASAP
Luke kicked a soccer ball into the air. The height, f(x), of the ball, in meters, after x seconds was modeled with the function f(x)=-4.5x^2+27x. How many seconds did it take for the soccer ball to hit the ground?
A. 40.5 seconds
B. 3 seconds
C. 6 seconds
D. 2.5 seconds