
But x must be a natural number, so the answer is

.
Answer:
104.5 meters square
Step-by-step explanation:
The area of a trapezoid is found using the formula A = 1/2 (a + b)h. Substitute a = 8, b = 11 and h = 12.
The area is A = 1/2(8+11)*12.
A = 1/2 (19)*12 = 104.5
Lower quartile (xL): 27
Upper quartile (xU): 65
<span>Interquartile range (xU-xL): 38</span>