Governments, for many reasons, often intervene in international markets, offsetting some of the efficiencies that may be realized with specialization based on comparative advantage and trade.
when governments imposes a tax on imports, this is knows as:

a. a quota.
b. a tariff.
c. an export subsidy.
d. dumping.

The correct answer is option b.

Explanation:

A tariff is a tax imposed on the imports of a product. It is used to restricts imports from another country by increasing the price of goods and services. Tariffs are generally of two types:

Specific tariffAd-valorem tariff

A quota is a quantitative restriction on imports of goods and services. An export subsidy is a type of subsidy that is paid to the domestic producers to encourage exports.

Dumping is a situation when a country, a firm or an industry sells a product in a foreign market at a lower price than what it charges in domestic market.

$527.7.if the following was the question  $527.7 is the answer.students who are trying to raise funds have an agreement with a local pizza chain. the chain has agreed to sell them pizzas at a discount, which the students can then resell to families in the local community for a profit. it is expected that of the 500 families in the community, at most 70% will buy pizza. based on a survey of their personal preferences, the students believe that they should order no more than 120 cheese pizzas, no more than 150 pepperoni pizzas, and no more than 100 vegetarian pizzas. they also want to make sure that at least 20% of the total pizzas are cheese and at least 50% of the pizzas are pepperoni. they make a profit of $1.45, $1.75, and $1.98, respectively, for each cheese, pepperoni, and vegetarian pizza they resell. how many pizzas of each type should they buy?