Simple Interest

Each of the problems below is a link. If you click on the problem, it will take you to a YouTube video of a full, step-by-step solution for the problem. You may try these problems as practice and use the videos to check your answer, or you can just watch the videos to see more worked-out example problems.

Calculate the interest you would earn if you invested $1000 at 2.5% simple interest for five years.
How much would you have to invest at 6% simple interest to earn $300 in interest in two years?
Suppose you want to invest $500 in an account and have it worth $590 at the end of four years. What interest rate would be required to earn that much money?
How long would you need to leave $1200 in an account earning 2.5% simple interest in order to earn $300 in interest?