What is the simple interest rate on a $1350 investment paying $319.82 interest in 10.3 years?  % (round to the nearest tenth of a percent)

A new investment opportunity for you is an annuity that pays $850 at the beginning of each year for 3 years. You could earn 5.5% on your money in other investments with equal risk. What is the most you should pay for the annuity?

Find the unpaid balance on the debt. (Round your answer to the nearest cent.) After 7 years of monthly payments on $150,000 at 3% for 25 years.

Suppose you'd like to save enough money to pay cash for your next car. The goal is to save an extra $25,000 over the next 5 years. What amount must be deposited quarterly into an account that earns 4.2% interest in order to reach your goal? Round your answer to the nearest cent, if necessary.