Anybody have any clue how to do this:

This exercise uses the radioactive decay model.

A wooden artifact from an ancient tomb contains 65% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)
________yr

Question

Anybody have any clue how to do this:

This exercise uses the radioactive decay model.

A wooden artifact from an ancient tomb contains 65% of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)
________yr

anonymous · Answer

yes

anonymous · Answer

help me please

anonymous · Answer

use the formula of half life

anonymous · Answer

i know your earthquake one

anonymous · Answer

but i cant find it

anonymous · Answer

already got that one for earthquake what is halflife formula

anonymous · Answer

use this http://en.wikipedia.org/wiki/Half-life

anonymous · Answer

can u just please just help me find the anser its the last problem i have to do tonight

anonymous · Answer

don't be lazy solve it yourself :-D

anonymous · Answer

hint. it is less than 5730 years