The DeWitt Company has found that the rate of change of its average cost for product is C'(x)=(1/4)-(100/x^2) where x is the number of units and cost is in dollars. The average cost of producing 20 units is $40.00. (a) Find the average cost function for the product. (b) Find the average cost of 50 units of the product.

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Exponential Growth Model

The relation that represents an exponential function is: