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

I think Y is the answer to number 4...

About 370,000 people live in a circular region

jadenmenlovep7s7uj

12.03.2022

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:

$D =\frac{n}{\pi r^2}$

Where,

n: number of people

Substituting values we have:

$D =\frac{370000}{\pi (5000000)^2}$

Rewriting:

$D = 4.71*10^{-9}$

the population density in people per square mile is:

$D = 4.71*10^{-9}$

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