Answer:
[tex]3a\times 3a\times 3a[/tex]
Step-by-step explanation:
The given expression is;
[tex](3a)^3[/tex]
Recall that;
[tex]a^m=a\times a\times \times a....[/tex] m-times.
In [tex](3a)^3[/tex] means
[tex]3a\times 3a\times 3a[/tex]
The correct choice is the third option
