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A flying disk (150 g, 25.0 cm in diameter) spins at a rate of 290 rpm...

A flying disk (150 g, 25.0 cm in diameter) spins at a rate of 290 rpm with its center balanced on a fingertip. What is the rotational kinetic energy of the Frisbee if the disc has 70% of its mass on the outer edge (basically a thin ring 25.0-cm in diameter) and the remaining 30% is a nearly flat disk 25.0-cm in diameter?

1)What is the rotational kinetic energy of the Frisbee? (Express your answer to two significant figures.)

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