Consider a Competitive Firm with the Short-Run Cost Function

Consider a competitive firm with the short-run cost function
C(q)= 20 + 6q + 5q²
The firm faces a market price of p for its output.
a.Derive the firm's profit maximizing condition.Is the sufficient second order condition satisfied?
b.Suppose a specific tax of t (t < p)is levied on only this firm in the industry.What is the profit maximizing level of output as a function of p and t? (Assume the price is high enough that the firm does not shut down)
c.How does the output change as the tax increases? Use calculus to determine the relevant comparative static.
d.How does the firm's profit chance as the tax increases? Again,use calculus to determine the relevant comparative static.Show that profit decreases as t increases.

Correct Answer:

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a.Profit maximization occurs where p = M...

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