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Mathematics 18 Online
OpenStudy (anonymous):

Each time a customer uses a prepaid long-distance calling card, she is charged a $1.50 connection fee, plus $0.25 per minute of talk time. The times (in minutes) for a for the customer's first seven calls are shown below:

OpenStudy (anonymous):

OpenStudy (anonymous):

can you explain it ?

OpenStudy (anonymous):

hello?

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