Practice and Explorations In Exercises 25-30, find the future value of each ordinary annuity. The payments are made, and interest is compounded as given. Then determine how much of this value is from contributions and how much is from interest. Show work - see class notes for examples. 25. R = 9200; 10% interest compounded semiannually for 7 years 26. R = 1250; 5% interest compounded semiannually for 18 years Ans. $71,626.77. $45,000 from contributions and 26,626.77 from interest. 27. R = 800; 6.51% interest compounded semiannually for 12 years 28. R = 4600; 8.73% interest compounded quarterly for 9 years Ans. $$247,752.70. $165,600 from contributions and $82,152.70 from interest. Find the periodic payment that will amount to each given future value under the given conditions. 35. FV = $10,000; interest is 5% compounded annually; payments are made at the end of each year for 12 years. 36. FV = $150,000; interest is 6% compounded semiannually; payments are made at the end of each semiannual period for 11 years. Ans. $4912.11