Question

One phone company advertises a flat rate of .07 per minute for long distance calls your long distance plan charges five dollars per month plus a rate of .05 per minute how many minutes do you have to talk to each month so that your average cost is less than .07 per minute

Answer 1

5.00 + .05x < .07x
5.00 < .02x
250 < x
So, you need to use more than 250 minutes to make it cost less