Cost, Revenue, and Profit A company that manufactures sport supplements calculates that its cost C and revenue R can be modeled by the equations C = 145,000 + 0.85x and R = 220x - 1 2 where x is the number of units of sport supplements produced in 1 week. Production during one particular week is 1,000 units and is increasing at a rate of 150 units per week. Find the rate of change (in dollars per week) of the following. (a) cost dC dollars/week dt (b) revenue dR dollars/week dt (c) profit dollars/week dt

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