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## Homework Statement

A player hits a volleyball when it is 4 ft above the ground with an initial vertical velocity of 20 ft/s (equation would be h = -16t

^{2}+ 20t + 4). What is the maximum height of the ball?

## Homework Equations

quadratic formula

## The Attempt at a Solution

t = -20 ±√20

^{2}- 4(-16)(4) / 2(-16)

t = -0.175390 and 1.425390

I don't think my answer is correct, but I don't know what else to do. And I don't know how to find the maximum height of the ball using the answer above :( Any help would be greatly appreciated, thank you!!