posted by Anonymous
Suppose your cell phone company offers two plans. The pay-per-call plan charges 14 dollars per month plus 6 cents per minute. The unlimited-calling plan charges a flat rate of 22 dollars per month. How many minutes per month must you use for the unlimited-calling plan to become cheaper?
plan 1: cost = 14 + .06n , where n is the number of minutes
plan 2: cost = 22
14 + .06n= 22