The value of A is 34.

III. APPLICATION: Solve the following application of first order differential equations problems with complete solutions. Round off your final answer to 4 significant figures. 1. Two tanks are connected in series. The first tank initially contains 250 grams of salt with 300 L of solution while the second tank contains 200 L of pure water. Assume: solutions are mixed thorougly before leaving the tank. Vimax = 1000 L, Vzmax =750 L. A = class number (2 -20) = 20. (30 pts.) A g/L salt 10 L/min 1 9 L/min 2 6 L/min A. Find the concentration of salt (Ib/gal) in tank 1 and 2 after 100 minutes. B. Find the concentration of salt (Ib/gal) in tank 1 and 2 when tank 2 is in full capacity. C. Find the concentration of salt (lb/gal) in tank 1 and 2 when the volume of two tanks are the same. Assumption: No effect of potential energy and friction factor from tank 1 to tank 2.