A firm has this cubic cost function: where Q is output (the number of items produced) and

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A firm has this cubic cost function:image text in transcribed

where Q is output (the number of items produced) and C is the total cost of producing these items. The marginal cost MC is a quadratic function:image text in transcribed

a. What is the marginal cost at Q = 0?

b. At Q = 0, is the slope of the marginal cost function positive or negative?

c. Does the slope of the marginal cost function increase or decrease as Q increases?

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