A tank contains 175 liters of fluid in which 20 grams of salt is dissolved. Brine containing 0.75 gram of salt per liter is then pumped into the tank at a rate of 3 L/min; the well-mixed solution is pumped out at the same rate. What is the exponent of e in the integrating factor if qin is the inflow rate? Select one: a. (Inflow rate divided by tank volume) b. (Inflow rate divided by outflow rate) c. (Inflow rate divided by outflow concentration) d. (Outflow rate divided by tank volume) Which of the following statements is TRUE about the mixture model? Select one: a. The solution to the mixture model is obtained using the separation of variables. b. In a steady state system, the inflow is equal to the outflow. c. The value of k is positive. d. In an unsteady state system, the inflow is equal to the outflow. How much salt in grams is in the tank in 30 minutes? Select one: a. 106.70 b. 13.888 c. 165.69 d. 34.781 e. 235.96 f. 64.731

A tank contains 175 liters of fluid in which 20 grams of salt is dissolved. Brine containing 0.75 gram of salt per liter is then pumped into the tank at a rate of 3 L/min; the well-mixed solution is pumped out at the same rate. What is the exponent of e in the integrating factor if qin is the inflow rate? Select one: a. (Inflow rate divided by tank volume) b. (Inflow rate divided by outflow rate) c. (Inflow rate divided by outflow concentration) d. (Outflow rate divided by tank volume) Which of the following statements is TRUE about the mixture model? Select one: a. The solution to the mixture model is obtained using the separation of variables. b. In a steady state system, the inflow is equal to the outflow. c. The value of k is positive. d. In an unsteady state system, the inflow is equal to the outflow. How much salt in grams is in the tank in 30 minutes? Select one: a. 106.70 b. 13.888 c. 165.69 d. 34.781 e. 235.96 f. 64.731 At what time in minutes will the concentration of the tank be equal to one-half of the maximum concentration? Select one: a. 30.790 b. 26.883 c. 35.250 d. 18.232 e. 27.502 f. 26.531