Monthly Archives: July 2014

The Back of the Dollar Bill

Have you ever wondered what is on the back (technically, the reverse) of a US dollar bill? The a salient feature of the reverse side of the bill is the Great Seal of the United States, which pictures an eagle on … Continue reading

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Can You See Across Lake Michigan?

If you go to the Sears Willis Tower, can you see Michigan? We can use geometry to answer the question. We can use the Pythagorean Theorem to find the length of the side of a right triangle: . In this case the … Continue reading

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How We Can Save the Elephants

Externalities are a type of market failure that are loosely defined as an action for which the full cost or benefit of that action is not reflected in the market price. The implication of which is that since the person doing the … Continue reading

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