13A-36. A 55-gal saltwater fish tank is prepared by adding 1/2 cup of salt to each gallon of fresh water. Over time, 3 gallons of pure water (no salt) evaporated from the tank. To replenish the tank, an additional 8 gallons of saltwater was removed. How many cups of salt should be mixed with fresh water to make up the 11 gallons needed to restore the salt concentration of the tank to the proper level? Answer: 4.23 or 4.23*10^0
13A-60 Geometry problem.