Each year, a cyber café charges its customers a base rate of $25, with an additional $0.30 per visit for the first 50 visits, and $0.10 for every visit after that. How much does the cyber café charge a customer for a year in which 72 visits are made?
42.20
36.60
47.80
51.10
Detailed Explanation
Translate the information into arithmetic.
The café charges 25 + 0.30 (first 50) + 0.10(x) (x is additional visits after 50). For 72 visits there are 50 visits with an additional 22 visits.
=25 + 0.30(50) + 0.10(22)
=25 + 15 + 2.20
= 42.20
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