Radioactive carbon decays exponentially with a half-life of 5,780 years. Determine how long ago a sample of carbon began to decay if there is now 5% of it left.
I'm not sure how to get started to all help is appreciated!
Follow Math Help Forum on Facebook and Google+
Let A= the amount of radioactive material remaining at anytime t, you have the following information
Use the following
this will help you solve for k.
After this solve for t when
View Tag Cloud