If g(x) = 4 then g(45) is
\(\bf g(x)=4\sqrt{x}\qquad g(45)=4\sqrt{\boxed{45}} \\\\ now\ \begin{cases} 45\to 3\cdot 3\cdot 5\to 3^2\cdot 5 \end{cases} \\\\ thus\implies g(45)=4\sqrt{45}\implies g(45)=4\sqrt{3^2\cdot 5}\implies ?\)
