1. Trey wants to have $5,000 in 3 years and an additional $25,000 in 10 years. If he can invest his money at 8.8%, how much must he invest today?
2. Dani will invest $3,000 today and $6,000 in 3 years. At an interest rate of 10.2%, how much will she have in 8 years?
3. What effective annual rate can a bank earn on an APR of 17%, compounded weekly?
4. Given an interest rate of 9.6% per year, what is the value of a perpetual stream of $1,120 annual payments?