This is a very crude model, and here is a list of some of the reasons why. You
can probably think of others.
- The radius of the earth is not 4000 miles-that's just an approximate
figure that you might remember from elementary school.
- The earth is not a perfect sphere. It has a larger radius at the equator
than at the poles, and the surface itself is very irregular.
- Most of the earth's surface is water. Presumably, we're only interested
in dividing up the dry land.
- The population is almost certainly not exactly 5.5 billion. In fact,
it's difficult to pin down any particular population, since it changes every
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Joseph L. Zachary
Department of Computer Science
University of Utah