Answers for Timeline

1.   2500 years
2.   1000 years
3.   900 BCE
4.   80 years
5.   400 BCE
6.   8 years
7.   87 years
8.   552 years
9.   327 years
10. 879 years
11. 39 years
12. 90 years
13. 58 years
14. 10 or 11 centuries (depends on how timeline is interpreted)
15. 7,000 years