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A company is manufacturing ear buds. The number of sets of earbuds they sell, x, and...

A company is manufacturing ear buds. The number of sets of earbuds they sell, x, and the price at which they will sell them, p, are related by the equation 40x^2 = 1200 – 3p^2. How is the number of earbuds they sell changing when x = 2 and the price is increasing at a rate of $0.20 per set of earbuds per week?

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