A large tank holds 300 gallons of brine solution with 40 pounds (lb) of salt. A concentration
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A large tank holds 300 gallons of brine solution with 40 pounds (lb) of salt. A concentration of 2 lb/gallon is pumped in a rate of 4 gal/min. The concentration leaving the tank is pumped out at a rate of 3 gal/min. How much is in the tank after 2 hrs?
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