In a monopolistically competitive market, the seller maximizes profits by

Under what market structure do we have only one dominant firm?

Bob owns an auto parts firm. He uses a combination of steel and aluminum to produce his auto parts. All of the following combinations will produce the desired output. Steel costs $15 per unit and the aluminum costs $50 per unit. What combination of steel and aluminum should he use to minimize the cost of producing the desired output?

If a company has significant economies of scale in the long run—assuming a large market —the company will tend to

According to the Law of Diminishing Returns, the

Increases in total fixed costs affect

Computer equipment is believed to be a normal good. This means that

A firm’s average total cost is minimized at $10/unit when it produces 5 units. What is the marginal cost when the firm produces 5 units? 

Assume your company produces good X using only two inputs, labor (L) and capital (K). Also, assume L is measured on the horizontal axis and K on the vertical axis. If input prices are $15 per unit of labor and $5 per unit of capital, what is the slope of the isocost line?

An independent trucker has to choose one of the four possible combinations of inputs listed below, each of which delivers the same level of output. The two inputs are drivers and machinery. If he buys expensive machinery, then he can hire fewer drivers to deliver the same output. The input combinations are Method 1: 20 drivers, 10 machines;Method 2: 50 drivers, 2 machines;Method 3: 100 drivers, 0 machines;Method 4: 10 drivers, 12 machines.Hiring a driver costs $10. Each machine costs $100. Which method should he use to minimize the cost of delivering the same output?