Question

A 48 gram sample of a substance that's used for drug research has a k-value of 0.1325.
Find the substance's half-life, in days.
N=N0e^-kt
Help pleasee!

Answer 1

set
\[e^{-.1325t}=\frac{1}{2}\] and solve for \(t\)

Answer 2

\[-.1325t=\ln(.5)\]
\[t=-\frac{\ln(.5)}{.1325}\] and a calculator