Question

Will the ball clear the crossbar of the goal post, which is 10 feer off the fround.

Answer 1

The problem gives you X, so replace X witht he given vaule and solve for y:

y = -0.1x^2 + 4X

X = 40

y = -0.1(40)^2 +4(40)

y = -0.1(1600) + 160

y = -160 + 160

y = 0