The demand equation for a particular kind of shirt is 2px+65p-4950=0, where x hundreds of shirts are demanded per week when dollars is the price of a shirt. Suppose that the shirt is selling this week at $30, and the price increases at the rate of $0.20 per week. Find the rate of change in demand.
Differentiate both sides with respect to
Solve for
Given
Substitute
The rate of change in demand is shirts per week.
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