What is the velocity of an object that has fallen 76 feet

Ignoring air resistance ...

vf^2-vi^2=2gs, where vf is final velocity, vi=initial velocity, g=acceleration due to gravity, and s is the displacement of the object ...

For an object being dropped, vi=0, so we have only have final velocity.

v^2=2gs

v=-√ (2gs), g≈-32ft/s^2, s=-76

v=-√ (2 (-32) (-76))

v=-√4864

v≈ - 69.74 ft/s (to nearest hundredth of a foot per second)

It's negative because the object is falling, or height is decreasing : P