Figure It Out: Antiono gets utility from consuming two goods, burgers and fries. His utility function is given by where B is the amount of burgers he eats and F the servings of fries.
Antonio’s marginal utility of a burger is , and his marginal utility of an order of fries is . Antonio’s income is $20, and the prices of burgers and fries are $5 and $2, respectively.
Burgers cost $5, and fries cost $2. If Antonio maximizes his utility, how many fries should he purchase to accompany every burger?
Antonio should buy +jEDcWw2tUQ= servings of fries for each burger he purchases.