# ECON 342 ECON342 Exam 1 with Answers (Penn State University)

ECON 342 ECON342 Exam 1 Answers (Version 1) (Penn State University)

1. **(40 Total Points) **Suppose there are two firms operating in a market. The firms produce identical products, and the total cost for each firm is given by C = 10q_{i}, i = 1,2, where q_{i} is the quantity of output produced by firm i. Therefore the marginal cost for each firm is constant at MC = 10. Also, the market demand is given by P = 106 –2Q, where Q= q_{1} + q_{2} is the total industry output.

2. **(20 Total Points) **Suppose in the short run a perfectly competitive firm has a fixed cost , F = $147. The firm’s variable cost of production is given by TVC = 3q +3q^{2}, where q is the quantity of output that the firm produces. The marginal cost of the firm is given by MC = 3 + 6q. The market demand for the good is given by Q_{d} = 145 - 2P, where Q_{d} is the total quantity demanded and P is the price of the good. Also, the market supply is given by Q_{s} = -50 + 3P.