Problema Solution
an internet provider charges 130 setup fee and a 60 monthly fee. Find the cost C(t) of having a contract with this provider for t months. If a person has paid 970 to the internet provider, how many months has he had a contract with them?
Answer provided by our tutors
C(t) = 130 + 60t
C(t) = 970, we need to find t
130 + 60t = 970
by solving we find:
t = 14 months
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the person had 14 months contract with them.