The marginal products of the first, second, and third workers are 20, 12, and 8, respectively. If four workers can produce 45 units of output, then the marginal product of the fourth worker is

In the above figure, the inflationary gap when AD2 is the aggregate demand curve equals

A) the difference between 110 and 100. B) the difference between $16.5 trillion and $16.0 trillion. C) LAS minus SAS at a price level of 100. D) AD1.

Carlos receives a consumer surplus of $10 for the first glass of lemonade. For the second glass, he receives a consumer surplus of $8, and for the third glass, he receives a consumer surplus of $6 . His total consumer surplus from the three glasses of lemonade is _____

a. $10 b. $24 c. $14 d. $15