SOLUTION: hello! I have been trying to figure out how to do this for a while and cant seem to grasp it, any help is appreciated! thank you (: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Algebra ->  Equations -> SOLUTION: hello! I have been trying to figure out how to do this for a while and cant seem to grasp it, any help is appreciated! thank you (: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~      Log On


   



Question 1193549: hello! I have been trying to figure out how to do this for a while and cant seem to grasp it, any help is appreciated! thank you (:
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The amount of carbon 14 present in a paint after t years is given by A(t)=A o e^-0.00012t. The paint contains 15​% of its carbon 14. Estimate the age of the paint.
​(Round to the nearest year as​ needed.)

Found 2 solutions by Boreal, ikleyn:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
A(t)/Ao=0.15=e^-0.00012t
ln both sides to remove e
-1.897=-0.00012t
15,809 years

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.

On radioactive Carbon-14 dating,  read and learn from the lessons
    - Using logarithms to solve real world problems
    - Radioactive decay problems
    - Carbon dating problems
in this site.

Also,  you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Logarithms".


Save the link to this online textbook together with its description

Free of charge online textbook in ALGEBRA-I
https://www.algebra.com/algebra/homework/quadratic/lessons/ALGEBRA-I-YOUR-ONLINE-TEXTBOOK.lesson

to your archive and use it when it is needed.