we have the equation
[tex]\begin{gathered} 8*9^x=35.68 \\ solve\text{ for x} \\ 9^x=\frac{35.68}{8} \end{gathered}[/tex]
Apply log on both sides
[tex]\begin{gathered} log(9^x)=log(\frac{35.68}{8}) \\ \\ xlog(9^)=log(\frac{35.68}{8}) \\ \\ x=\frac{log(\frac{35.68}{8})}{log(9^)} \\ x=0.68 \end{gathered}[/tex]
The answer is option B
