# Economics word problem help

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Question description

A competitive firm’s cost of production is C(Q) = Q^3-20Q^2+125Q. The firm’s problem is to choose the

value of Q> or = 0 that maximizes its profit.

(a) If the market price is 48, then find all points (if any) that satisfy the FOC, and determine whether

each of those points satisfies the local SOC. Calculate the profit-maximizing quantity. (Justify

(b) Repeat part (a), assuming that the market price is 24.

(c) Draw a picture of the firm’s supply curve. You should show the exact coordinates of the points

where Q=0, Q=10, and Q=20.

(d) In what circumstances should the firm choose Q=5?

(e) If this were a free entry industry, then what would be the long run equilibrium price?

(Top Tutor) Daniel C.
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School: UCLA
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