We know area of triangle = 
In triangle ABC , AB is the base and BC is the height
Now we find the distance between A and B
Distance formula is 
A(0,3), B(7,3)
Distance AB = 
=
= 7
B(7,3), C(7,7)
Distance BC = 
=
= 4
area of triangle = 
area of triangle = 
=
= 14 
Answer:
By applying Pythagoras theorem
Answer is √[109] inch
(14,300 x 100) / 22,000 = 65%
100% - 65% = 35%
I think that A would work, considering they're not looking for movie theaters prices.