5. Based on the data if Kathy tells her grandchildren how she found bones in her yard the 1948 with only 99.89% of carbon- 14 inside of them. How old would the bones be in today? 6. Susan wants to sale her chemicals to the public health association. She states that her chemicals can reduce a radio-active substance from 12g initially down to 6g four years later. The president of the association asked her to prove her findings by telling him how much radio-active substance will be present in 7 years. 7. Becky must pay a lump sum of $ 6000.00 in 5 Years at a mortgage company but, she only has S 5000.00 available today. What annual interest rate is necessary for the money to increase to $ 6000.00 in 5 years? 8. What are the regular periodic deposits that Earl must make to get $ 250,000.00 in his annuity if its compounded quarterly for 30 years at 4.8% a. What is his total deposit? b. How much interest was earned? 9. Carol want to purchase a future value annuity by putting down a deposit of $ 2000.00 compounded yearly at 4.5% for 20 years. a. How much money will be available at the end of 20 years b. What is her total deposit? C. How much interest was earned? 10. Tom and his wife want to establish an account that will supplement their retirement income beginning 30 years from now. a. What is the lump sum deposit they must make today so that $ 500,000.00 will be available at that time if compounded quarterly at 8%