Oxygen and Strontium Isotope Analyses of a Sample of Human

question 2

Multiple Choice

Oxygen and strontium isotope analyses of a sample of human skeletons at Teotihuacan indicated that

• A) many people had suffered from starvation
• B) some people were not originally from Teotihuacan
• C) some people had been victims of cannibalistic practices
• D) some people had died from a contagious disease

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Definitions:

Long-run Equilibrium

A state in which all inputs and outputs in an economy are optimally allocated, and all firms make zero economic profit, reflecting no incentives for market entry or exit.

Consumer Demand

The desire of consumers to purchase goods and services at given prices, which can vary with changes in income, preferences, and prices of related goods.

Purely Competitive Firm

A company operating in a market where there are many buyers and sellers, the product is homogeneous, and there are no barriers to entry or exit.

Economic Profits

The difference between total revenue and total costs, including both explicit and implicit costs, indicating the profitability of a business venture beyond basic operating costs.