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10. A company estimates that it will sell N(x) units of a product after spending $x thousand on advertising. N(x)=4x-0.25x +500 0x12 a) How

10. A company estimates that it will sell N(x) units of a product after spending $x thousand on advertising. N(x)=4x-0.25x +500 0x12 a) How much money should the company spend on advertising to reach the point of diminishing returns? Use an appropriate sign chart to show this.

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