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Unformatted text preview: 3 days. Initially it covers 1% of the pond. How long will it take to cover the whole pond? 7. (10 points) For what values of a, b and c is it true that [ 1 0 0 2 ][ a b c ] = [ a b c ][ 1 0 0 2 ] 8. (12 points) Solve the general solution to ( x1)( x2) y ′′ = y ′1 , x > 2 . 9. (12 points) A solution containing 3 g/liter of salt ﬂows in a 60 liter tank at a rate of 6 liters/min. Initially the tank is half full of pure water. The well stirred mixture ﬂows out at a rate of 4 liters/min. How much salt (in grams) is in the tank when it overﬂows? 3...
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 Fall '08
 BER
 Differential Equations, Linear Algebra, Algebra, Equations, Kilogram, Boundary value problem

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