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The total profit (in dollars) from the sale of x x answering machines is P(x)=20x−0.5x2−280. P...

The total profit (in dollars) from the sale of x x answering machines is P(x)=20x−0.5x2−280. P ( x ) = 20 x − 0.5 x 2 − 280. (A) Find the exact profit from the sale of the 26th machine. Exact Profit on 26th machine = (B) Use the marginal profit to approximate the profit from the sale of the 26th machine. Approx. profit on 26th machine =

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