Using potassium–argon radiometric dating, they discovered that the tools contained 25 percent radioactive potassium-40. How old are the tools? The half-life for potassium-40 to argon-40 is 1.25 billion years. Can someone help me do this??

Question

Using potassium&ndash;argon radiometric dating, they discovered that the tools contained 25 percent radioactive potassium-40. How old are the tools? The half-life for potassium-40 to argon-40 is 1.25 billion years. Can someone help me do this??

bringmetherain · Answer

@SeanStewart16

seanstewart16 · Answer

this isnt biology, its geology, and i dont remember how to do this, sorry

bringmetherain · Answer

I'm gonna shoot myself ahh. My lesson doesn't tell us how to did this at all.

bringmetherain · Answer

@soprano.h.d0816

soprano.h.d0816 · Answer

Hold on a sec. Lol
@agent0smith

soprano.h.d0816 · Answer

And please don't shoot yourself, lol XD

agent0smith · Answer

Looks like you're missing parts of the question. It's a half life/exponential decay problem.

You should have a half life equation in your notes.

bringmetherain · Answer

This is literally the whole question "Scientists found stone tool specimens in a cave in Africa. Using potassium&ndash;argon radiometric dating, they discovered that the tools contained 25 percent radioactive potassium-40. How old are the tools? (You must show your calculation to receive credit.) The half-life for potassium-40 to argon-40 is 1.25 billion years."

bringmetherain · Answer

and I won't xD