ACTIVITY

Answer the following questions:

1. A 100 gallon tank is filled with brine containing 60 pounds of dissolved salt. Water runs into the tank at the rate of 2 gallons per minute and the mixture, kept uniform by stirring, runs out at the same rate. How much salt is in the tank after 1 hour? 2. What constant interest rate is required if an initial deposit placed into an account that accrues interest compounded continuously is to double its value in five years? 3. Solve the equation (D3 + 3D2 - 9D - 27)y = 0 4. Solve the equation (D4 + 13D2 + 36)y = 0 5. Solve the equation (D+ + 9D3 + 502 -93D -90)y = 0