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Answer the following chemistry problem. Report the volume to the nearest gallon of sulfuric acid.

How many gallons of 15% sulfuric acid must be mixed with how many gallons of 70% sulfuric acid to make 640 gallons of a 39% sulfuric acid solution?

The number of gallons of 15% sulfuric acid needed is gallons.

The number of gallons of 70% sulfuric acid needed is gallons.