Answer: Region C ⇒ Region A ⇒ Region B
Explanation:
Density = Number of people / Area of region
The regions are in circles based on the fact we were given the radius and area of circle = π * radius²
Region A Density = 14,200,000 / (3.142 * 13²)
= 26,742 people per square mile
Region B Density = 19,700,000 / (3.142 * 15²)
= 27,866 people per square mile
Region C Density = 23,550,000 / (3.142 * 18²)
= 23,133 people per square mile
Order from least to greatest is:
Region C ⇒ Region A ⇒ Region B