In 2013, about what percentage of goods and services sold in the United States was imported?

When is it not necessary to build a new market supply schedule?

(A) When new technology is used to produce a good. (B) When there is a change in input costs. (C) When there is a change in the number of suppliers. (D) When there is a change in the price of a good.

Generally, the demand for energy in the long run will be

a. approximately equal in elasticity to the demand for energy in the short run. b. considerably less elastic than in the short run. c. considerably more elastic than in the short run. d. perfectly inelastic because we must have energy to survive.