Question

17. The District of Columbia has a very high population density.

There are 646,449 people in 68.3 square miles.
a. Calculate the unit rate in terms of people per square mile for the District of Columbia.
Make sure the precision of your answer is reasonable.

Answer 1

9465 people/square mile.

Explanation:

If there are 646,449 people in 68.3 square miles for the district of columbia, the unit rate in terms of people per square mile for the District of Columbia will be expressed as shown;

646,449 people = 68.3 square miles

x people = 1 square mile

Cross multiply

646,449 people * 1 square mile = 68.3 square miles * x people

x = 646,449 people * 1 square mile/68.3 square miles

x = 646,449/68.3 square miles

x = 9464.8463 square miles

x ≈ 9465 people/square mile.

Hence the unit rate in terms of people per square mile for the District of Columbia is approximately 9465 people.