Use the following to answer questions:
Figure: The Perfectly Competitive Firm 
-(Figure: The Perfectly Competitive Firm) Look at the figure The Perfectly Competitive Firm. The firm faces demand curve d and maximizes profit. In a long-run equilibrium, this firm will produce _____ units of output and sell its output for _____.
Definitions:
Premack's Principle
A principle stating that more probable behaviors can serve as reinforcers for less probable behaviors.
High-Probability Activities
Activities that an individual is highly likely to engage in, often used in behavior modification by allowing access to them as a reward.
Reinforcing
Strengthening a behavior by providing a consequence that will increase the likelihood of the behavior's recurrence.
Probability
A measure of the likelihood that an event will occur, expressed as a number between 0 and 1, where 1 represents certainty.
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