Maximizing Profits: The weekly demand for DVDs manufactured by a certain media corporation is given by p = -0.0004x^2 + 45, where p denotes the unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with producing these discs is given by C(x) = -0.002x^2 + 15x + 2500, where C(x) denotes the total cost (in dollars) incurred in pressing x discs. Find the production level that will yield a maximum profit for the manufacturer. Hint: Use the quadratic formula. (Round your answer to the nearest integer.) x = DVDs