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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
2 Nov 2021

Given information

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

Step-by-step explanation

Step 1.

 The derivative   tells us the amount for which the total cost will change when the interest rate changes. The units of   are dollars per interest rate.

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