Answer:
c. a firm's marginal cost is zero.
Explanation:
Free entry is the <em>condition in which new firms are allowed to enter an industry costlessly</em> in order to achieve an economic benefit by establishing production and beginning to sell the product. To keep the equilibrium in the market free entry also allows free exit of firms.
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The answer is Factories.
New inventions in pieces of machinery make it more efficient for the company's owner to create a building structure that far different from the common cottage.
factories provide several features that do not exist in a cottage, such as waste pipe, Tall room in order to stack up inventories etc.
The best answer is the disengagement theory!
The desengangement theory (Cumming, Henry, 1961) specifically focuses on the last years of life and sees them as something natural in human life.
The other theories, such as the activity and the continuity theories stress that the older people should remain active and not completely retire.
Native American homes had a variety of forms. The Plains Indians resided in <em>teepess</em> or portable home made of poles and animal hides. Those in the Northeast such as Iroquios live in <em>wickiups</em> or longhouses, covered with bark sheets.
Those in the Southeast including the Cherokee and Choctaw lived in hamlets called <em>chickees</em> that are thatched roofs with open walls. Eskimos and Aleut had dome-shaped houses made of snow or timber.
Native Americans were gradually decimated and expelled from their lands with the arrival of Europeans in the 16th century. They faced military conquest, epidemics, enslavement, and have been subjected to discriminatory policies.
But drawing from their cultural resources and active political mobilizations, they have begun to regain their autonomy in various spheres including rights to their lands.
To learn more about Native American responses to American society: brainly.com/question/9547522
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