In Problems 1-8, convert the given interest rate to decimal form if it is given as a percentage, and to a percentage if it is given in decimal form. 1. 3% 2. 5.25% 3. 0.105 4. 0.08 5. 4.75% 6. 16% 7. 0.21 8. 0.005 In Problems 916, convert the given time period to years, in fraction form, assuming a 360-day year (this assumption does not affect the number of quarters (4), months (12), or weeks (52) in a year). 9. 4 months 10. 39 weeks 11. 240 days 12. 6 quarters 13. 12 weeks 14. 10 months 15. 2 quarters 16. 30 days - In Problems 17-24, use formula (1) for simple interest to find each of the indicated quantities. 17. P = $300; r = 7%; t = 2 years; 1 = ? 18. P = $950; r = 9%;t = 1 year; I ? 19. I $36; r 4%;t = 6 months; P = ? 20. 1 = $15; r = 8%;t 3 quarters; P =