(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The total cost of repaying a student loan at an interest rate of r% per year is C=f(r).

a. What is the meaning of the derivative f '(r)?

b. What does the statement f '(10)=1200 mean?

2. Relevant equations

3. The attempt at a solution

For part a I think the meaning of the derivative f '(r) means change in interest rate and for part b I think that f '(10) is the interest rate and 1200 is the cost.

I am not sure though so does anybody know if I am correct? Thank you in advance!

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Meaning of derivative in terms of interest rate?

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