Part C

The semicircle shown $($Figure $3)$ has a moment of inertia about the $x$ axis of $46\mathrm{.}0f{t}^4$ and a moment of inertia about the $y$ axis of $46\mathrm{.}0f{t}^4.$ What is the polar moment of inertia about point C $($the centroid$)?$ Express your answer numerically in biquadratic feet $($feet to the fourth power$)$ to three significant figures.

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