Answer:
216 ft
Step-by-step explanation:
area of a rectangle is L(ength) * W(idth)
L=12 W=18
12 * 18 = 216
Assuming that all of the 255 sold seats were filled, then
[tex]\frac{sold}{total} *100\\[percent filled]
(225/260)*100=86.53%
100%-86.53%=13.4%
13.4% of seats are empty!