SOLUTION: Please help with this problem also. Media services charges $30 for a phone and 20/month for its economy plan. Find a model that determines the total cost c(t) of operating a me

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Question 359485: Please help with this problem also.
Media services charges $30 for a phone and 20/month for its economy plan. Find a model that determines the total cost c(t) of operating a media service phone for t months.C(t) = $50 ??? Is that correct? Seems to easy
Use the model to find the total cost for 2 months of service
Total cost = $100 ??? Really seems to easy.
Please advise if it is correct. Thank you.

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The fixed cost is the cost of the phone, $30. The variable cost is $20*t, where t is the number of months of operation. The total cost is then fixed cost plus variable cost. The total cost is then C%28t%29=20t%2B30.