p(x) = 1 + x + x^2 q(x) = 2 + 2x + x^2
p(x) + q(x) = 3 + 3x +2x^2
x^2 + 2xy +y^2
A tank originally contains 100 litres of pure water. Salt water with a concentration of 2 kg/L is pumped into the tank at 3 L/min, and the well-mixed solution is drained at the same rate.Set up an initial value problem describing the situation. Be sure to explain all of your variables.
dQ/dT = 6 - 3Q/100 where Q(t) = the amount of dissolved salt in the tank at time t.