Question

Golfer hits the ball. the quadratic function y= -16x^2+80x gives the time x seconds when the golf ball is at height 0 ft. how long does it take for the golf ball to return to the ground?

Answer 1

You factorize, and solve for `y=0`

Explanation:

`y=-16x^2+80x=-16*x*(x-5)=0->`

So `x=0or(x-5)=0->x=5` seconds