cheergirl2854
09.07.2019 •
Mathematics
The telephone company offers two billing plans for local calls. plan 1 charges $24 per month for unlimited calls and plan 2 charges $16 per month plus $0.04 per call. a. use an inequality to find the number of monthly calls for which plan 1 is more economical than plan 2. b. explain the meaning of the answer to part a.
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Ответ:
more than 200 calls
Explanation:
Suppose number of calls = x
According to plan 1: Total monthly charge is $24
According to plan 2: Fix charge is $16 and $0.04 per call
cost of x's call = $0.04x
and monthly charge according to plan 2 = 0.04x + 16
a) Plan 1 is more economical than plan 2.
0.04x + 16 > 24
solve it for x
.04x > 8
x > 200
b) So, if more than 200 calls are made then Plan 1 is more economical.
Ответ: