Atank contains 480 gallons of water and 45 oz of salt. water containing a salt concentration of sin t) oz/gal flows into the tank at a rate of 9 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? round the values to two decimal places. oscillation about a level = amplitude of the oscillation = oz.