SOLUTION: Please explain each part thoroughly. The half-life of carbon-14 is 5770 years. a. If you start with 1 gram of carbon-14, how long will it take for only 0.25 grams to remain?

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Please explain each part thoroughly. The half-life of carbon-14 is 5770 years. a. If you start with 1 gram of carbon-14, how long will it take for only 0.25 grams to remain?       Log On


   



Question 977787: Please explain each part thoroughly.
The half-life of carbon-14 is 5770 years.
a. If you start with 1 gram of carbon-14, how long will it take for only 0.25 grams to remain?
b. Assuming that we start with 25 grams of carbon-14, find a formula that gives the amount of carbon-14 left after t years.

Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Everything needed is here:
http://www.algebra.com/algebra/homework/Exponential-and-logarithmic-functions/Exponential-and-logarithmic-functions.faq.question.977781.html

Take logarithm of each side of basic exponential decay model equation, and work from that.