The problem asks us to find an expression equivalent to $6(6f)$.

1. Problem Description

The problem asks us to find an expression equivalent to $6(6f)$.

2. Solution Steps

We are given the expression $6(6f)$.

Using the associative property of multiplication, we can rewrite this as $(6 \cdot 6)f$.

Since $6 \cdot 6 = 36$, the expression simplifies to $36f$.

We check the answer choices:

$6f + 6$ is not equal to $36f$.

$f + 36$ is not equal to $36f$.

$f + 12$ is not equal to $36f$.

$6(f \cdot 6)$ can be rewritten as $6(6f) = (6\cdot 6)f = 36f$.

Associative Property of Multiplication:

$a(bc) = (ab)c$

3. Final Answer

6(f.6)