9. The marginal cost curve is the short-run supply curve: a. at all points b. as

Question

9. The marginal cost curve is the short-run supply curve: a. at all points b. as long as the firm is not operating. c. as long as the firm is operating. d. only between minimum average total cost (ATC) and minimum average variable cost (AVC) e. only above minimum average total cost (ATC) 10. Barriers to entry a. measure the ability of firms to set the price for a good b. do not exist for monopolies. c. always lead to profits. d. restrict the entry of new firms into the market. e. exist for perfectly competitive firms.

Explanation / Answer

Q9
Answer
option c
The firm is operating above minimum average variable cost and the MC above it is short-run supply curve

Q10
option d
it restricts the entry of new firms in the market and that may be natural like the economics of scale or human-made like laws.

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