question 1 question 2 question 3 question 4 question 5 question 6 question 7 question 8 question 9 question 10 question 11 question 12 question 13 question 14 question 15 question 16 question 17 question 18 question content area top part 1 the radioactive element carbon-14 has a half-life of 5750 years. a scientist determined that the bones from a mastodon had lost 65.5% of their carbon-14. how old were the bones at the time they were discovered?