Allison walks three fourths of a mile in three tenths of an hour. What is his speed in miles per hour?
3/10 of an hour = (3*60 min)/10 = 18 minutes
3/4 mile per 18 minutes = 0.75/18 = 75/1800 (to get rid of the decimal)
75/1800 = x/6000
x = 250 now we must move the decimal point back to get 2.5 miles/hr
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