27+26+25+24+23+22+21+20+19+18+17+16+15+14+13+12+11+10+9=342
A.342 seats.
11 plus what number equals 16 in order to complete your problem.
Answer:
To find the sum of interior angles in a polygon, we can use the formula:
where n is the number of sides.
Since this is pentagon (5 sides), then 
The missing angle would then be

Since angles on a straight line add up to 180, then


B
Step by step explanation This is how I got the answer to your question and I gave you the solution I hope this helps you out