If you could give me the question maybe I can answer it!!
Answer: 9
Step-by-step explanation:
Given
The function is 
To make it a perfect square, compare it with 
Here,

So, c must be square of b i.e. 9

Therefore, value of c is 9.
What is the question that you are asking? How many seats are left? 88. Or is there more to this question that is not showing?
Answer : C
15.1x33.5= ans C