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45 mph = 66 feet per second
12 to the second power is 144...2 to the second power is 4, any # to the second power is the # times itself.
45 miles per hour = 66 feet per second
45 x 103 = 45 x 1,000 = 45,000
45 kilometers/second (1 mile/1.609 kilometers)(5280 feet/1 mile) = 147,669 feet per second ===================