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

How many gallons of 35% nitric acid must be mixed with how many gallons of 60% nitric acid to make 720 gallons of a 39% nitric acid solution?

The number of gallons of 35% nitric acid needed is gallons.

The number of gallons of 60% nitric acid needed is gallons.