Question 633093
In 1998, archaeologists found that the amount of carbon-14 in the petroglyphs
 was 88.5%. 
 Determine the approximate age of the petroglyphs. 
 Show the carbon-14 dating model for the age of the petroglyphs
:
Radio active decay formula
A = Ao(2^(-t/h), where:
A = remaining amt after t years
Ao = initial amt t=0
t = time in yrs
h = half-life of substance
t = time of decay
:
A = .885
Ao = 1
h = 5730, the half life of carbon-14
:
1*2^(-t/5730) = .885
using nat logs
{{{-t/5730}}}*ln(2) = ln(.885)
{{{-t/5730}}} = {{{ln(.885)/ln(2)}}}
{{{-t/5730}}} = -.17625
t = -5730 * -.17625
t = 1010 years is the age of the petro-whatevers