Question: Please answer the Nonexact De and Application No. 1 only. Note. The value of A is 34 Non-exact Differential Equations 5. (xy + 2xy-x)dy +

Non-exact Differential Equations 5. (xy + 2xy-x)dy + (xy In y+3y +

Please answer the Nonexact De and Application No. 1 only. Note. The value of A is 34

Non-exact Differential Equations 5. (xy + 2xy-x)dy + (xy In y+3y + 2xy)dx=0 6.2xdy + (xy+2y-2ey )dx=0 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, V2max=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 (lb/gal) in tank 1 and 2 after 100 minutes. B. Find the concentration of salt (lb/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. 2. Finding the temperature of the inside refrigerator by taking a water bottle and let warm. (7 pts.) Data given: After 1 hour, T = 15C After 2 hours, T = 25C Room Temp. 32C 3. The covid-19 cases in the Philippines as of October 31, 2020-380,729 and as of November 30, 2020, there are 429, 864 cases. Assuming constant rate of growth, how many cases will be at exactly 12:00 PM of December 25, 2020? (8pts.) Proverbs 9:10 "The fear of the Lord is the beginning of wisdom: and the knowledge of the holy is understanding. " GODBLESS Prepared by: Checked & Verified by siedmens

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