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The credit remaining on a phone card (in dollars) is a liner function of the total calling time made with the card (in minutes) the remaining credit after 30 minutes of calls is $15.20 of the remaining
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The credit remaining on a phone card (in dollars) is a liner function of the total calling time made with the card (in minutes) the remaining credit after 30 minutes of calls is $15.20 of the remaining credit after 46 minutes of the Calls is $12.64 what is the remaining credit after 54 minutes of calls???

User Sebastian Nowak
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Answer:

Remaining credit = $11.36 [11 dollars and 36 cents]

User SunilThorat
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