Posted by sky on Wednesday, July 13, 2011 at 12:43am.
In the formula A(t) = A0ekt, A is the amount of radioactive material remaining from an
initial amount A0 at a given time t, and k is a negative constant determined by the nature
of the material. An artifact is discovered at a certain site. If it has 72% of the carbon-14 it
originally contained, what is the approximate age of the artifact? (carbon-14 decays at the
rate of 0.0125% annually.) (Round to the nearest year.)
algebra 2 - Reiny, Wednesday, July 13, 2011 at 9:03am
You are solving
.72 = 1(e^(-.0125t)
ln .72= ln (e^(-.0125t))
-.0125t = ln .72
t = ln.72/-.0125 = appr. 26.28 years
algebra 2 - Inu, Thursday, June 20, 2013 at 12:25am
convert % to decimal.
ln 0.72=ln e^-0.000125t
Answer This Question
More Related Questions
- Algebra please check my answers - 1) The linear function f(x) contains the ...
- precalc - I am really struggling with a bunch of problems. Any help with any of ...
- Algebra 2 help... - A half life of a certain radioactive is 36 days. An initial ...
- math - 6. The half-life of a certain radioactive material is 32 days. An initial...
- calculus - Carbon-14 is a radioactive substance produced in the Earth's ...
- Algebra I - A sample of radioactive material weighing 45 grams has a decay rate ...
- math - 8. The half-life of a certain radioactive material is 71 hours. An ...
- Pre-calculus - Initially 600 milligrams of a radioactive substance was present. ...
- math algebra - The amount A, of 70 grams of a certain radioactive material ...
- Math - D.E.Q. - The half-life of a radioactive isotope is the amount of time it ...