Mathematics, 16.04.2020 19:51 AM28

The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total calling time (in minutes). The monthly cost for 38 minutes of calls is $16.05 and the monthly cost for 61 minutes is $18.58. What is the monthly cost for 45 minutes of calls

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The monthly cost (in dollars) of a long-distance phone plan is a linear function of the total callin...