The price of apples has recently fallen in the marketplace. From this information, we can safely predict that: a. a shortage of apples must have existed. b. the demand for apples recently increased. c. the supply of apples recently decreased. d. a surplus of apples must have existed.

d.a surplus of apples must have existed.

Explanation:

If the supply of apples increased while there is no change in the demand for Apples, there would be a surplus and price would fall.

If the supply of apples decreased while there is no change in the demand for Apples, there would be a shortage of apples and price would rise.

If the demand for apples recently increased while supply remains unchanged, there would be a shortage and the price of apples would rise.

I hope my answer helps you

answer: marginal utility of the fourth brownie is 0.

explanation: marginal utility is the addtional utility gained from the consumption of one more unit of a good. it is given by,

so, marginal utility at the 4th unit will be given by

since, the values are not given here, you can simply find marginal utility at fourth unit by subtracting total utility at 3rd unit from total utility at 4th unit.