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OpenStudy (anonymous):
A DVD is approximately 12 centimeters in diameter. The drive motor of the DVD player is controlled to rotate precisely between 200 and 500 revo- lutions per minute, depending on what track is being read. (a) Find an interval for the angular speed of a disc as it rotates. (b) Find the linear speed of a point on the outermost track as the disc rotates.
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