Question

can someone show me how to do this please. i really dont know how to do it

The half-life of carbon14 is 5,730 years. If a fossil is determined to have a carbon-14 amount corresponding to 4 half-lives, what is the approximate age of the fossil?

22,000 years
35,000 years
17,000 years
29,000 years

Answer 1

i feel it wud be 17190 yrs

Answer 2

wouldn't it be 22k years? Just a guess, or a hunch rather! I would go with Shegs answer!

Answer 3

hey u have 100 % today
so after 5730 yrs wt will be 50 %
after another 5730 years 25%
then 5730 years 12.5%
then 5730 yrs 6.25%
then 5730 yrs 3.125%
thne 5730 yrs 1.5625%



so on.

Answer 4

It says it's corresponding to 4 half-lives, not that it has 1/8 of the original amount. It's ~22,000 years

Answer 5

22000