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The profit, p, earned from...

The profit, p, earned from the sale of a particular product by a business is given by p(d) = -0.25d2 +5d+80, where d is the number of days the product has been for sale.

(a) Determine the vertex of the profit function.

(b) Explain what the vertex means in the context of this problem.

(a) Determine the vertex of the profit function.

(b) Explain what the vertex means in the context of this problem.

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