- #1
hvidales
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Homework Statement
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?
Homework Equations
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!