An 16--long bicycle crank arm with a pedal at one end is, Ask an Expert

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An 16--long bicycle crank arm, with a pedal at one end, is attached to a 23--diameter sprocket, the toothed disk around which the chain moves. A cyclist riding this bike increases her pedaling rate from 65 to 95 in 12 .What length of chain passes over the top of the sprocket during this interval?

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