any suggestions?

[justdontgetit]

After investing $1000 at an annual interest rate of 7% compounded continuously for t years, your balance is $B, where B = f(t). What are the units of dB / dt? What is the functional interpretation of dB/dt?


Suppose C(r) is the total cost of paying off a car loan borrowed at an annual interest rate of r%. What are the units of C'(r)? What is the practical meaning of C'(r)?

 

[stapel]

1) What are the units on B? What are the units on t? So what would be the units on (change in B)/(change in t)? What overall change is being measured?

2) Similar comments.

Eliz.