Answer: (i) $20 per model
(ii) $27 per model
(iii) Ginny has a comparative advantage in building models.
Explanation:
A country or a firm has a comparative advantage in producing a commodity if the opportunity cost of producing that commodity in terms of other commodities is lower than the other country or firm.
Opportunity cost is the benefit that is foregone for an individual by choosing one alternative over other alternatives available to him.
If the opportunity cost is lower for an individual then this will benefit him whereas if the opportunity cost is higher then this will not benefit the individuals.
Therefore,
Ginny's Opportunity cost of producing one model = 
= $20 per model
Eric’s opportunity cost of building models = $20 + 35% of $20
= $20 + $7
= $27 per model
Hence, Ginny has a comparative advantage in building models because Ginny's opportunity cost of building model is lower than Eric's opportunity cost.
Answer:
The correct answer is option C.
Explanation:
The production possibility curve shows the maximum possible bundle of two goods that can be produced using all the available resources and state of technology.
Since the resources are scarce, when we produce more of one good, we need to sacrifice more and more of the other good.
If all the resources in the economy are fully employed then it is not possible to increase the production of one good without decreasing the production of the other.
The economy can thus produce either on the production possibility curve or below it but not above it.
Answer:
Stella should consume less of milk and more of cookies to maximize total utility.
Explanation:
The price of cookies is $9, and the price of milk is $3.
Stella consumes 10 cookies and 5 cartons of milk.
The marginal utility of 10th cookie is 50 utils and the marginal utility of 5th carton of milk is 25 utils.
Her total utility will be maximized if the ratio of marginal utility and price will be equal for both cookies and milk.
Ratio for cookies
= 
= 
= 5.55
Ratio for milk
= 
= 
= 8.33
Since the ratio is higher for milk, it means that Stella should consume less of milk and more of cookies to maximize total utility.
The most appropriate intelligence test would be the WAIS IV test. This test is used for anyone between the age of 16 and 90 years old. It is frequently used to test adults and older adolescents. This intelligence test can be used for many different purposes (anything from job qualifications to treating psychological disorders).
Explanation:
1. percentage of a consumer's budget
