Which of the following rates converts to a unit rate of $12.50 per hour?

A. $328.90 per 26 hours
B. $355.60 per 28 hours
C. $307.20 per 24 hours
D. $312.50 per 25 hours

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes

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Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip