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

Question

asked May 14, 2019 1.3k views

1 Answer

Silentbicycle · Answer 1 · 2019-05-19T03:34:42+0000

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)