Question

About 370,000 people live in a circular region with a 5000000 radius.find the population density in people per square mile

Answer 1

By definition, the area of a circle is given by:

`A =\pi r^2`

Where,

r: radius of the circle

Then, the density of the population is given by:

`D =(n)/(\pi r^2)`

Where,

n: number of people

Substituting values we have:

`D =(370000)/(\pi (5000000)^2)`

Rewriting:

`D = 4.71*10^(-9)`

Answer:

the population density in people per square mile is:

`D = 4.71*10^(-9)`