document.write( "Question 224734: Media Services charges $20 for a phone and $30/month for its economy plan.\r
\n" ); document.write( "\n" ); document.write( "Fin a model that determines the totak cost, C(t), of operating a Media /services phone for t months.\r
\n" ); document.write( "\n" ); document.write( "C(t)=_________ \n" ); document.write( "

Algebra.Com's Answer #167853 by NYC Math Tutor(4) $\"\"$ $\"About$

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First, you want to identify your fixed and variable costs. Your fixed cost is the purchase of the phone. This is a $20 one-time purchase. No matter how many months you need to use your phone, you will only pay this $20 once. On the other hand, you will pay $30 each month you are using the phone so this is your variable cost. Using this information, set up the equation:\r
\n" ); document.write( "\n" ); document.write( "C(t) = 30t + 20 \n" ); document.write( "

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