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Unformatted text preview: of the initialvalue problem ) 1 ( , == ′ y xy x y . 8. Solve each differential equation. a. y xy dx dy ln 2 = b. 2 ) 1 ( , , 1 2 = = + ′ y x xy y x 9. You invested $800 at 6% interest for 3 years. Assuming that no deposits or withdrawals are made during that time, find: a. How much is in the account if interest is compounded quarterly. b. How much is in the account if interest is continuously compounded. 10. A tank contains 100 L of pure water. Brine that contains 0.1 kg of salt per liter enters the tank at a rate of 10 L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate. How much salt is in the tank after 6 minutes?...
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 Fall '09
 L. OLDEWURTEL
 3 ft, 5 ft, $800, 2 ft, 0.1 kg

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