Posted by **Anonymous** on Tuesday, April 10, 2012 at 11:50am.

assume that is the rate of change of the unit price of a commodity is proportional to the diference between the demand and the supply, so that dp/dt=k (D-S) where k is a constant of proportionalily. suppose that D=40-2p, S=5+3p, and P(0)=4.

find a formula for p(t)

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