A tank contains 180 gallons of water and 15 oz of salt. water containing a salt concentration of 1/7(1+1/5sint) oz/gal flows into the tank at a rate of 8 gal/min, and the mixture in the tank flows out at the same rate.
the long-time behavior of the solution is an oscillation about a certain constant level. what is this level? what is the amplitude of the oscillation?
