Each year at a college, there is a tradition of having a hoop rolling competition.
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Alex rolls his 0.250 kg hoop down the course. If the hoop has a radius of 50.0 cm, what is the moment of inertia of Alex's rolling hoop?

0.0625 kg ⋅ m2
0.125 kg ⋅ m2
12.5 kg ⋅ m2
625 kg ⋅ m2