By PEMDAS (or any alternative), <em>the first step should be to divide</em>, as D comes before A. So, 16 ÷ 4.
Hi..... the domain(D) will be:

Thanks... :)
Let log5 125 = x
Removing log you get 5^x = 125
Rewrite 125 as 5^3
Now 5^x = 5^3
x = 3
4u-24 because you have to take 4 and multiply it by your things inside your parentheses