Answer:
㏑([tex]\frac{b7}{9}[/tex])
solution
log10 ([tex]\frac{b7}{9 } = \frac{7log 10 (b)}{9}[/tex]
steps [tex]\frac{log10(b7)}{9}[/tex]
simplify log 10(b7) : 7log10 (b)
= [tex]\frac{7log10(b)}{9}[/tex]
