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HIGHLINE SCHOOL DISTRICT MATH OLYMPIAD

March 25, 2000

 

The Cell Phone Problem

 

Sally Savvy's Company offers two plans for her cellular phone service. Sally can choose either the individual plan or the corporate plan:

 

 

Individual plan:

55 per call

and $25 monthly service charge

 

 

 

 

 

 

Corporate plan:

25 per call

and a $50 monthly service charge

 

 

 

 

 

 

Give Sally some specific advice on which plan she should choose.

 

 

 

 

 

 

 

Your response should be made on the Response Sheet. You may use both sides of the sheet. Describe your strategies for solving the problem. Use more than one strategy for a top score.