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Mathematics 7 Online
OpenStudy (anonymous):

a phone company charges 10 cents per minute for the first 3 minutes of a call, and 10-c cents for each minute thereafter. what is the cost in cents of a 10 minute phone call?

OpenStudy (shane_b):

What exactly is the difference between 10 cents and "10-c" cents? I'm guessing this isn't U.S currency so I have to ask...

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