
Solve the Simple Interest Problems: 1. How much principal must be invested to earn $51.68 in two years at an interest rate of 4%? 2. You invested $443 and received $629.06 after seven years. What was the interest rate? 3. If you take out a loan that costs $277.60 over four years at an interest rate of 10%, how much was the loan for? 4. How much interest does a $887 investment earn at 7% over five years? 5. What will the final balance be for $191 invested at 4% for one year? 6. If a loan is taken out for $551 at 3% and costs $115.71, how long was the loan for? 7. What is the interest rate if a principal of $317 earns $38.04 in interest in three years? 8. If you invest $340 at an interest rate of 8%, how much money will you have after nine years? 9. How much interest is earned on $319 at 6% for seven years? 10. If a loan is taken out for $212 at 3% and costs $25.44, how long was the loan for? 
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