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50 Suppose the demand function for x thousand of a certain item is p=90+ (a) Find the marginal revenue. In x (b) Find the

50 Suppose the demand function for x thousand of a certain item is p=90+ (a) Find the marginal revenue. In x (b) Find the revenue from the next thousand items at a demand of 9000 (x = 9). where x>1 and p is in dollars.

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