We know the age of our rock

The potassium?

The rock as a whole

Do you see why this works now?

No

Hold on sorry

What don’t you understand

But that doesn’t prove it, if we knew before how old it was and we calculated to get the same date that would be accuracy wouldn’t it

I mean we assumed that its 157 million years but how did scientists find that out

Wow

Couldn’t have been with this method

We didn’t **assume** 157 million years

I just showed you how we calculated that

It was calculated, lol

I *just* showed you

Yeah u did

omfg

We isolated t

And we calculated 157 million

But u said that we put the 1.25 billion into the equation

That’s the half life of K-40

Okay hold on what was the 1.25 B

Okay

I self corrected

We want to find t

We don’t put 1.25B in our final equation

We leave it t

We put everything else into the equation

We put

Okay

But you assumed the equation to use didnt you

No

I can use calculus to prove why it works

It’s one of the things you learn in calculus

If you want the proof, google it

Ok fair enough. I havent finished calculus after all

That’s alright

@PhumoZTYPE

Do you understand why this works now

And how we didn’t make any assumptions

t = t½ln((K + Ar/0.109)/K)/ln(2)