Apple Inc. reports the following for three of its geographic segments for a recent year. ($ millions) Americas Europe China Operating income $ 30,684 $ 16,514 $ 17,032 Sales 96,600 54,938 44,764 Compute profit margin for each division. (Round your answers to 1 decimal place.)

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.