Answer:
The answer is B
Step-by-step explanation:
To solve this problem you must apply the proccedure shown below:
If
, you have that:

Because
and 
Therefore, as you can see, the answer is: 
<span>c^2 ⋅ c^9
= c^11
------------------------------</span>
The answer would be 99, because because if you remove the decimals and the 0's you get 99.
I wouldn't put it on Brainly. I would read the book and work it out by myself instead. That way, if I was lucky, I might learn something.