Your fomula can be rewritten h = 0.88d and is obviously wrong. The football does not keep rising in a straight line.
A correct formula would have the form:
h = - g (d/Vxo)^2 + Vyo*(d/Vxo).
where Vxo is the horizontal velocity component (which remains constant) and Vyo is the initial vertical velocity component
I believe you should have written
h(d)= -0.02d^2+ 0.9d
This would correspond to a football kicked with a horizontal velocity component of 22.1 m/s and an initial vertical component of 19.9 m/s.
Anyway, to do the proplem, set
h(d)= -0.02d^2+ 0.9d = 0 and solve for d, and take the answer that is not zero. You will get 45 meters, which is about 50 yards. that is typical for a field goal.