Garland,
Your 250 Mile Radius and 500 mile if you live by the ocean is unfair!!!
Area of Circle = PieXRadius(squared)
Scenario 1:Area = 3.14 X 250(2) = 196,250 sq miles..pretty close
Scenario 2:Area = 3.14 x 500(2), then divide the result by 2 because presumably half of your area is water.
Area still = 392,500 sq miles...after dividing by two
So living next to an ocean gives you exactly twice the sqaure area to pick from...
Important math tip to remeber when doing exercises like this or buying pizza, increasing the radius by only 2x increases your area by 4x.