Express your answer using two significant figures. The technique known as potass

Question

Express your answer using two significant figures. The technique known as potassium-argon dating is used to date oldlava flows and thus any fossilized skeletons found in them. Thepotassium isotope 40 K has a 1.28 billion yearhalf-life and is naturally present at very lowlevels. 40 K decays by betaemission into the stable isotope 40 Ar . Argon is a gas, andthere is no argon in flowing lava because the gas escapes. Once thelava solidifies, any argon produced in the decay of 40 K is trapped insideand cannot escape. What is the age of a piece of solidified lava with a 40 Ar/40 K of 0.29? ---> t =?billion years? Express your answer using two significant figures.

Explanation / Answer

This question is VERY similar. I know mastering physics canbe a pain, but if you follow the steps used in this problemexactly, you'll be able to figure it out.    cramster(dot)com/answers-mar-08/physics/repost-potassium-argon-dating-the-technique-known-as-potassium-argon-dating-is-used-to_208130.aspx
Not that I'm too lazy to re-write the method, or anything, it justseems redundant if all I do is copy and paste what that guywrote.
Best of luck!

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