Noelle stands at the edge of a cliff and drops a rock. the height of the rock, in meters, is given by the function f(x)=−4.9x^2+17 , where x is the number of seconds after noelle releases her rock. cesar, who is standing nearby on the ground, throws a rock straight up in the air. the height of cesar’s rock, in meters, is given by the function g(x)=−4.9x^2+13x , where x is the number of seconds after he releases his rock. there is a moment when the rocks are at the same height.