3 1. Amanda invests $800 at 5%. What is the interest earned in 10 months? 4 2. Brendan invests $1100 at 6 %. How much does he have 35 weeks later? 4 3. Cindy's investment earns 4% interest. How much did she invest, if 2 the interest earned in 1 year and 9 months is $150 ? 4. David invested $1500 at 6 %. Now he has $1987.50. 2 How long ago did he invest the $1500? 163 5. Emily's investment of $3000 has earned $567 interest over two and a half years. What was the rate of interest? 6. Fernando invested $4400 three years ago. Now he has $5500. What is the rate of interest? 7. Gillian's investment of $5000 at 71% has earned $320 interest. 4 How long ago was the investment made? 8. Henry's investment at 5% earned him $480 interest over a period of 600 days. How much did he invest? 9. Irina has $3400 in her account, which pays 9% per annum compounded monthly. How much will she have after two years and eight months? 8% pays per annum compounded 10. Jason invested $2800 in an account that quarterly. How much will he have after three years and three months? 31% 11. Karen's account pays 3% per annum compounded semi-annually. How much interest will she earn over 4.5 years on a $6000 investment?