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    				| 1. | The marginal revenue and marginal cost functions of a company are MR = 30 – 6x and MC = -24 + 3x where x is the product, then the profit function is _______(a) 9x2 + 54x (b) 9x2 – 54x (c) 54x – 9x2/2(d) 54x – 9x2/2 + k | 
| Answer» (d) 54x – 9x2/2 + k Profit = ∫(MR – MC) dx + k = ∫(30 – 60) – (-24 + 3x) dx + k = ∫(54 – 9x) dx + k = 54x – 9x2/2 + k | |