Answer:
Ans. c) The annual percentage rate of the loan is approximately 913%
Step-by-step explanation:
Hi, well, she borrowed $75 and paid $90 ($75 + $15 fee) in 8 days. So we need to use the following formula to check what 8 days percentage rate was applied to this loan.
![r=(FinalValue)/(InitialValue) -1](https://img.qammunity.org/2020/formulas/business/high-school/491e4if6uhn1amxppeb498xxs22lrz30ik.png)
That is:
![r=(90)/(75) -1=0.20](https://img.qammunity.org/2020/formulas/business/high-school/6ybfgid79evw88d1to7jezulj1s2nnzbag.png)
So she pays 20% for 8 days, to know the annual rate (approx.) we need to do the following operation.
![r(Annual)=(0.20)/(8Days) *(365Days)/(1Year) =(9.13)/(1Year)](https://img.qammunity.org/2020/formulas/business/high-school/l81axp5gxexvbcku1n7zfuxzgpt4zigdqt.png)
That is 913% per year.
Best of luck.