A firm's profit is A. the difference between revenue and cost. B. usually negative when opportunity costs are included. C. the difference between marginal revenue and marginal cost. D. the opportunity cost of the firm's shareholders.

Tom has brought $150,000 from his pension to a new job where his employer will match 401(k) contributions dollar for dollar. each year he contributes $3,000. after seven years, how much money would tom have in his 401(k)?

Differentiate between the trait, behavioral, and results-based performance appraisal systems, providing an example where each would be most applicable.

Which of the following best explains how trade enables greater specialization among producers? a. trade diversifies the market by bringing specialized goods from around the world. b. trade requires distribution networks and adds one more step to the production process. c. trade enables producers to open up new markets for their goods and services. d. trade allows people to focus on one kind of production and trade for their other needs.