A cell phone plan cost $30 per month for unlimited calling plus $.15 per message.

A. Write a linear model that represents the monthly cost of the cell phone plan if the user sends t text messages.
B. if you send 200 text messages, how much would you pay according to this cell phone plan?

3 answers

c(m) = .15 m + 30.00

c(200) = .15(200) + 30
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