**sqrt(2 / (((((pi * 18 000) / (mi^2)) * 80) / year) * (30 minutes))) = 141.683342 meters**

What do you think?

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What do you think?

I get a smaller radius (139.33m) since I used the population density of 18,600 from the article. I recommend changing the equation to have ’2Q’ in the numerator, where Q = quality. The radius would be directly proportional to the quality, which not only makes logical sense, but it makes the equation more interesting.