Simplify the expression. #22

Answer:
[tex]10^{\log 9}=9[/tex]
Step-by-step explanation:
It's a logarithm property:
[tex]x^{\log_x{a}}=a[/tex]
However, we can use a procedure like this:
[tex]10^{\log 9}\\\Rightarrow y=10^{\log 9}\;\;\;\;\;\;\;\;\;\text{Apply }\log\text{ to both sides}\\\log{y}=\log{10^{\log 9}}\;\;\;\;\;\;\;\;\;\text{Apply log property}\\\log{y}=\log 9\cdot\log{10}\;\;\;\;\;\;\;\;\;\text{Apply log property}\\\log{y}=\log 9\cdot1\\\log{y}=\log 9\\\\\Longrightarrow\boxed{y=9}[/tex]