Problem 3. (10 points) Select the correct answer for the question (only one answer is correct). If you select an answer an then change your mind, make sure you uncheck your previous answer. A tank originally contains 550 L of water with concentration of 70 grams of dye per liter. Water containing 15 g of dye per liter is poured into the tank at a rate of 12 L/min, and the well-stirred mixture is allowed to leave the tank at the rate of 7 L/min. Let Q(t) be the amount of dye (in grams) at any time t 2 0 before the water starts to overlow. What initial value problem describes this situation? DA. do -12.15-7. Q Q(0) = 38500 dt 550 - 5t Q B . dQ - 12.15-7. Q(0) = 70 dt 550 + 12t Q C. dQ - 12 - 15 - 7 . Q(0) = 38500 dt 550 + t' Q = 12 . 15 - 7 . Q(0) = 38500 dt 550 + 5t O E. do - 12 - 15 - 7. Q . dt 550 Q(0) = 70 OF. none of the above Hide