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Question 974005: The swimming pool in Bob’s backyard holds 10 gallons of water. A gallon of water costs d dollars and takes m minutes to come out of the hose. If it takes Bob 5 minutes to fill his swimming pool, which of the following expressions represents the amount of water, in gallons, that was already in the pool before he started to fill it?
A. 2
B. 10 − (5d/m)
C. 10 − (5/m)
D. 10 − (5/dm)
E. 10
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! The swimming pool in Bob’s backyard holds 10 gallons of water. A gallon of water costs d dollars and takes m minutes to come out of the hose. If it takes Bob 5 minutes to fill his swimming pool, which of the following expressions represents the amount of water, in gallons, that was already in the pool before he started to fill it?
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The cost is not relevant.
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5 minutes * 1 gal/min = 5 gallons
10 - 5 = 5 gallons already in this gigantic pool.
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