Answer: 
A) $13.79 per ticket 
Explanation:
Hi, to answer this question we have to apply an exponential increase function: 
A = P (1 + r) t 
Where: 
p = original price 
r = increase rate (decimal form) 
t= years 
A = price after t years 
Replacing with the values given: 
A =7.50 (1+ [7/100]) ^9 
A = $13.79 per ticket 
Feel free to ask for more if needed or if you did not understand something.