The subscriber needs to use 363 minutes in a month in order for the second plan to be preferable
What should be sign between the equations for the second option to be better?
The sign between the equation of the first cell phone plan and the second phone plan must less than for the second option to yield more value
Let x be number of minutes of call
Total cost of first option=0.20x
Total cost of second option=39.95+0.09x
For the second option to be better, its value must be less than that of first option
39.95+0.09x<0.20x
39.95<0.20x-0.09x
39.95<0.11x
39.95/0.11<x
x>363
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