Assume that the short-run cost and demand data given in the tables below confront a monopolistic competitor selling a given product and engaged in a given amount of product promotion. 
If the firm sells 3 units of output, marginal revenue will be
Definitions:
Confidence
The degree of certainty or belief in one's abilities, qualities, or the reliability of something.
Insecticide
Chemical substances used to kill or control the population of insects, typically used in agriculture and pest control.
Margin Of Error
A statistic expressing the amount of random sampling error in a survey's results, indicating a range within which the true population parameter is likely to lie.
Bushels
Bushels are a measure of volume used primarily in agriculture, especially in the United States, for dry commodities such as grains or produce.
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