@volleyballgurl48,
potential energy = mgh
m = mass of steel ball (5.7-kg)
g = acceleration due to gravity (gravitation constant) (9.8-m/s^2)
h = 25-m + 0.20-m (include the 0.20-m because the indent in the sandbox that the steel ball made needs to be accounted for)
therefore: mgh = (5.7-kg)(9.8-m/s^2)(25-m + 0.20-m)
= (5.7-kg)(9.8-m/s^2)(25.20-m)
= 1407.672J
≈ 1407J or 1410J