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walkie talkie phone company charges $18.00 for basic phone service per month and $0.15 per minute for long distance calls. Arena calls charges $80.00 per month with no fee for long distance calls. For what number of minutes of long distance calls is the cost of walkie talkie more then the cost of arena calls?

  • math -

    for m minutes, we want

    18.00 + 0.15m > 80.00 + 0m
    .15m > 62.00
    m > 413.3

    or, m >= 414

  • math -

    $22.00+$0.20l>$30

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