For integers a and b
$$16 ^ { a } \cdot 9 ^ { a } = 6 ^ { b } \cdot 8 ^ { 2 }$$
Given this equality, what is the sum $\mathbf { a } + \mathbf { b }$?
A) 6
B) 9
C) 12
D) 15
E) 20
For integers a and b

$$16 ^ { a } \cdot 9 ^ { a } = 6 ^ { b } \cdot 8 ^ { 2 }$$

Given this equality, what is the sum $\mathbf { a } + \mathbf { b }$?\\
A) 6\\
B) 9\\
C) 12\\
D) 15\\
E) 20