The charges for an international call made using the calling card for two phone companies are shown in the table. a. What is the
2 answers:
Answer:
Part A:
Let the number of minutes for both companies to have the same cost be = x
For company A :
For company B :
To get the length of call same, we will equal both the equations.
Solving for x;
x = 10 minutes
Part B:
After 10 minutes, it will be better to use company B as after 10 minutes, company A will be costly.
When x = 12
A :
= 71 cents
B:
= 69 cents
When x = 13
A :
= 74 cents
B:
= 71 cents
With each increasing minute, company A will become costly as compared to B.
You might be interested in