Question

(4(pir^3-600))/r^2=0

what is r?

Answer 1

\[\frac{ 4(\pi r^3-600) }{ r^2 }=0\]

Answer 2

\[\pi r ^{2} - 600 = 0\]
\[r=\sqrt{600/\pi}\]
\[r \approx 13.82\]
or
\[r \rightarrow -\infty\] or \[r \rightarrow \infty\]