Monday
May 25, 2015

Homework Help: ALGEBRA

Posted by Katie on Thursday, April 17, 2008 at 8:31pm.

Beginning in 1995, three digit area codes could begin with any number except 0 or 1. The middle and last number were not limited. How many area codes became available. I know the answer is 640 but I don't know how to explain that answer.

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