Ben is driving on the highway at x miles per hour. (One mile equals 5,280 feet.) Ben's tires have a circumference of t feet. Which of the following expressions gives the number of revolutions each wheel turns in one hour? Choices
A) 5,280(x/t)	B) 5,280(y/x)	C) 5,280(xy)	D) 5,280/(xy)	E) (xy)/5,280
In one hour, at the rate of x miles per hour, Ben covers x miles, so 5,280x feet.   The number of revolutions = distance/circumference = 5,280x/t.   5,280(x/t)nswer: 5,280(x/t).
<result>A</result>
Ben is driving on the highway at x miles per hour. (One mile equals 5,280 feet.) Ben's tires have a circumference of t feet. Which of the following expressions gives the number of revolutions each wheel turns in one hour?