Question

Solve for pi : C=2^pi r

Answer 1

\[c=2^\pi r,2^\pi=\frac{c}{r},\pi=\frac{\ln c-\ln r}{\ln 2}\]

Answer 2

?

Answer 3

2^π=c/r
he just natural logged both sides then the pi comes down
π* ln(2)= ln(c/r)

Answer 4

So it's c over r?