Solve the Problem. -A 1000-Gallon Holding Tank Contains 100 Gallons of Water. Initially

Solve the problem.
-A 1000-gallon holding tank contains 100 gallons of water. Initially, each gallon of water in the tank contains 3 pounds of pollutants. Water containing 4 pounds of pollutants per gallon enters the tank at a rate of 50 gallons
Per hour, and the uniformly mixed water is released from the tank at a rate of 25 gallons per hour. How many
Pounds of pollutants are in the tank after 4 hours? At what rate (in pounds per gallon) are the pollutants being
Released after 4 hours?

A) There are 250 pounds of pollutants in the tank after 4 hours. The pollutants are being released at a rate of 1.25 pounds per gallon after 4 hours.
B) There are 650 pounds of pollutants in the tank after 4 hours. The pollutants are being released at a rate of 5.75 pounds per gallon after 4 hours.
C) There are 180 pounds of pollutants in the tank after 4 hours. The pollutants are being released at a rate of 4.35 pounds per gallon after 4 hours.
D) There are 750 pounds of pollutants in the tank after 4 hours. The pollutants are being released at a rate of 3.75 pounds per gallon after 4 hours.