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The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Acircle has a circumference of 7.850 units. what is its radius?

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?