Answer
The population density of Australia is 6.8 people per square mile. This means that, on average, each square mile of Australia's land area has 6.8 people.
Work Step by Step
We can find the population density of Australia.
$\frac{population}{area} = \frac{20,090,400~people}{2,967,908~mi^2} = 6.8~people/mi^2$
The population density of Australia is 6.8 people per square mile. This means that, on average, each square mile of Australia's land area has 6.8 people.
