Should the U. S get involved with the rest of the world or just stick to concierne within our borders?

We should, but not the way that pass administrations used to do.

Explanation:

Foreign relations are important. Completely secluding ourselves from other country will make it harder for companies In United States to establish business relationships with people in other country and we would be left without an alliance if other countries decided to declared war against us in the future.

Pass administrations (George W. Bush's for example) abuse United States foreign influence by meddling In  other country's private businesses. (Such as the disaster that we had with Middle East.)

That's not the foreign policy that we should be involved in.

We could focus on other more productive involvement such as working together with developed nations to solve global warming problems, establishing a fair business relationships with other countries that possess unique goods/products that we don't have, creating military alliance with the countries that possess a same ideology, etc.

answer; /// i do believe its the ; //(iroquois)they were made up of several groups who spoke a common language;

marginal cost is a microeconomic measure that us to evaluate the extent to which the level of production of a good is sustainable in accounting, that is, to how many quantities the company plans to profit from the production of the good.

the concept of marginal cost is simple, it means the cost of producing one more item. for example, in the case of pies, the marginal cost is the cost of producing one more pie than those that have already been produced.

it is important to understand that productive activity influences marginal cost. the marginal cost of some goods can be very high, while others may be insignificant. for example, the marginal cost of producing an extra plane is very high. already the marginal cost of a water company to provide 1l more water is derisory.

in the case of pies, the cost involves the inputs, the labor and the fixed cost, which involves the fixed space of the bakery. the level of production initially has the marginal cost decreasing because there is space and manpower available. however, to produce more you have to hire more workers and buy more inputs. if physical space is limited, workers will conflict with places, inputs and their productivity will decrease, meaning there is an optimum point of production for each level of space and manpower. from this point on, the productivity of the workers will be getting smaller because of lack of space, so that the marginal cost of producing one more pie will be increasing. so, although you have not posted the chart, but if you have the answer, you can see that my explanation goes according to the marginal cost curve that will increase from the 4th pie, answer (c).