Figure 10.2 shows a monopolist's demand curve. The marginal revenue from selling the third unit is:

Firms use two marketing tools to differentiate their products. What are these two tools?

A) market research and demand estimation B) brand management and advertising C) lobbying and word of mouth D) consumer surveys and market experiments

An entrepreneur

a. is an employee working in a factory b. manages a factory c. conceives of and starts a business d. contracts to work for a specific price e. estimates the risks and uncertainties of business