Middle school mathematics what is the answer as a ratio

How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places.

How do i do this activity, is appreciated

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36