Mathematics, 05.03.2021 18:10, acharity196

The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after 38 minutes of calls is $15.06, and the remaining credit after 70 minutes of calls is $10.90. What is the remaining credit after 98 minutes of calls?

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The credit remaining on a phone card (in dollars) is a linear function of the total calling time mad...