Hello, my classmate told me about your website. I have very simple question regarding finance:
Question: Compute the present value of a $100 cash flow for the following combinations of discount rates and times:
a: r = 8% ; t = 10 years

100/(1.08)^10=46.32

Liz, if you are using Excel I calculated it like this
PV=(8%,10,100), this should calculate the answer and will help you with remainder of homework.