Question 799625
You showed two functions, f and g.  What about them?  What do you want with them?  Tell us how they are linked or used?  Do they form a ratio?  Are they to be equal?  


You separated these two functions with a colon.  Is this intended as part of the problem?  


Write the full problem description.


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Another solved problem using the same skills you need for this question is shown in the solution posting, HERE:  http://www.algebra.com/algebra/homework/Finance/Finance.faq.question.799621.html
Different given function, but same exact concept and skills.