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A typical long-playing phonograph record (once known as an LP) plays for about 24 minutes at...

A typical long-playing phonograph record (once known as an LP) plays for about 24 minutes at 33 1/3 revolutions per minute while a needle traces the long groove that spirals slowly in towards the center. The needle starts 5.7 inches from the center and finishes 2.5 inches from the center. Estimate the length of the groove.

Math   Precalculus   
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