There are approximately 35,000 bald eagles in alaska, which covers 586400 square miles. what is the population density for the bald eagles in alaska?
a. 17 bald eagles per square mile
b. 0.04 bald eagles per square mile
c. 0.06 bald eagles per square mile
d. 1 bald eagle per square mile

The answer is c. 0.06 bald eagles per square mile.

The math is very clear. It can be solved using proportion.
If 35.000 bald eagles live in 586.400 square miles, how many of them will live in 1 square mile:
35.000 : 586.400 = x : 1
⇒  = 
⇒ x = 35.000 ÷ 586.400
⇒ x = 0.06

So, a population density is 0.06 bald eagles per square mile.