Posted by **louise** on Sunday, September 29, 2013 at 5:21am.

cellular phone companies. 1. with this plan each person is charged $19.95 per month and $0.31 per minute 2. with this plan each person is charged $40.95 per month and $0.16 per min 3. with this plan each person is charged $80.95 per month with unlimited minutes....define the variable, determine range of airtime for when each plan is least expensive

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