[jesusmichael]

No the purpose of the function, which is what is returns, is a group of zipcodes within a radius of a give zipcode.

Memorization=tabling which is exactly what I'm doing, but in a static sense.

Yes, its narrow, but the owners of the app don't want more than the 6 options given.

My point is that doing calculating the area of a circle around a give point on earth more than once is redundant. points on the earth don't move so if two points are within 1 mile of each other. They will always be so..