David built a model of a regulation basketball court. His model measured approximately 3.75 feet long by 2 feet wide. The dimens
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Let be the amount of water that evaporates. At the start, the solution in the tub consists of 2.5 gallons of salt (5% of 50 gallons). After
gallons of water evaporates, we're left with a solution with total volume
gallons, and 8% of this amount should be salt, or
gallons of salt. The amount of salt in the tank before and after evaporation remains unchanged, so
gallons of water need to be evaporated.