Posted by **Michelle** on Thursday, September 13, 2012 at 11:41pm.

Please help...a computerized spin balance machine rotates a 25 inch diameter tire at 480 revolutions per minute. (a) find the road speed in miles per hour at which the tire is being balanced (b) at what rate should the spin balance machine be set so that the tire is being tested for 70 miles per hour?

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