P/P0 = e^(-0.00012t) = 75% =0.75
-0.00012t = ln(0.75)
t = ln(0.75) / (-0.00012) = 2397 years.
This assumes we know P0 (the original amount of carbon-14 in the ivory) and that the only loss is due to radioactive decay.
3. Yes
4. No, not to a power of ten
5. BDAC
6. BACD
7. Top answer
8. 25
9. 15 x10^11
10. 24 x10^2
11. 7.23 x10^14
12. 9.191 x10^7
13. t^38
Does that help?
Yes,I do 1,110 is a cluster because it’s a very large number for 52 degrees and 189 is because it’s a very large number for 16 degrees.
Hope this helps :)
