SOLUTION: Need help solving this algebra problem: a long distance telephone call cost 10 cents for the first minute and 8 cents for e additional minute. the same call on long call systems co
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Question 317348: Need help solving this algebra problem: a long distance telephone call cost 10 cents for the first minute and 8 cents for e additional minute. the same call on long call systems cost 16 cents for the first minute and 6 cents for each additional minute. for what length phone calls is down east calling less expensive?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Plan A: where t is the length of the call, tmin=1.
Plan B:
.
.
.
Find t, such that Plan A > PlanB.
.
.
.
After 4 minutes, Plan B is less expensive than Plan A.
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