Ben is driving on the highway at x miles per hour. (One mile equals 5,280 feet.) Ben's tires have a circumference of y feet. Which of the following expressions gives the number of revolutions each wheel turns in one hour?
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A5,280$$(\frac{x}{y})$$
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B5,280$$(\frac{y}{x})$$
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C5289(xy)
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D$$5280\over({xy})$$
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E$$(xy)\over({5280})$$
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正确答案: A