DUE TOMORROW!
A football kicker tried to make a field goal with a ball on the 25 yard line (105 feet from the goal posts). The equation of the ball's path is modeled by f(x)=4/3x-x^2/90 where f(x) is the ball's highest in feet and the initial height is 0 ft since the ball is being kicked from the ground. What is the maximum height of the ball?