A firm's short-run average cost curve is u-shaped. which of these conclusions can be reached regarding the firm's returns to scale?
a. the firm experiences increasing, constant, and decreasing returns in that order.
b. the firm experiences first decreasing, then increasing returns to scale.
c. the firm experiences increasing returns to scale.
d. the short-run average cost curve reveals nothing regarding returns to scale.

What is the relationship between marginal external cost, marginal social cost, and marginal private cost? a. marginal social cost equals marginal private cost plus marginal external cost. b. marginal private cost plus marginal social cost equals marginal external cost. c. marginal social cost plus marginal external cost equals marginal private cost. d. marginal external cost equals marginal private cost minus marginal social cost. marginal external cost a. is expressed in dollars, so it is not an opportunity cost b. is an opportunity cost borne by someone other than the producer c. is equal to two times the marginal private cost d. is a convenient economics concept that is not real

Emily spent her summer vacation in buenos aires, argentina, where she got plastic surgery for a fraction of what it would cost in the united states. this is an example of:

Vendors provide restaurants with what? o a. cooked items ob. raw materials oc. furniture od. menu recipes