Question

In 1990 there were approximately 7 × 106 people living in New York City. New York City has an area of approximately 8.31 × 102 square kilometers. What was the population density of New York City in 1990? Answer in units of people/km2

Answer 1

The population density is the number of people divided by the area:

`(7*10^(6)\ people)/(8.31*10^(2)\ km^(2))`

`\approx0.842*10^(4)\ people/km^(2)`

`\approx8.42*10^(3)\ people/km^(2)`