- #1

jendrix

- 122

- 4

## Homework Statement

Carbon 14 has a half-life of 5730 years, what fraction will have decayed in 2300 years?

## Homework Equations

Nf/No =e^-kt

## The Attempt at a Solution

Nf/No =e^-1.21 x 10^-4 x 2300

=0.068585374

However if I use Nf =No(1/2)^2300/5730

I get 0.757125224

I appreciate that I'm looking for the fraction that has decayed but I'm unsure as to why this has produced 2 different answers, I thought either could be used for this problem.

Thanks