Assume that Sue gets seven utils of enjoyment from two apples and nine utils from three apples. The marginal utility of the third apple is:

nine utils.
seven utils.
three utils.
two utils.


Below is a table giving information about the costs and benefits of an activity. Answer the next question using this table.

Amount
Marginal Benefits
First
18
Second
14
Third
8
Fourth
7

The total benefit of three units is:

9. 24. 30. 40.


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