Assignment Scoring Will earn 5% extra credit for finishing this assignment 24 hours before Your best entire assignme 1. [-/3.5 Points] DETAILS SCALCET9 9.3.047.MI. A tank contains 7,000 L of brine with 12 kg of dissolved salt. Pure water enters the tank at a rate of 70 L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate. (a) How much salt is in the tank after t minutes? kg (b) How much salt is in the tank after 10 minutes? (Round your answer to one decimal place.) 1kg 2. [-/3.5 Points] DETAILS SCALCET9 9.5.014.EP. Consider the following differential equation. dt t In(t) + r = 2tet Find the coefficient function P(t) when the given differential equation is written in the standard form ". + P(t) - f(t). P(t) = Find the integrating factor for the differential equation. (Do not include a constant of integration.) elp(t) at Solve the given differential equation