I keep doing it and keep missing something.
SELECT zipCodes.*, Sqr(((69.1*(CDbl(zipCodes.Latitude)-39.166759))^2)+((69.1*(CDbl(zipCodes.Longitude)-84.53822)*Cos(39.166759/57.3))^2)) AS DistanceInMiles
FROM zipCodes
WHERE (((Sqr(((69.1*(CDbl(zipCodes.Latitude)-39.166759))^2)+((69.1*(CDbl(zipCodes.Longitude)-84.53822)*Cos(39.166759/57.3))^2)))<50));
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