Well, I am not exactly sure if this is what your asking but one foot is twelve times the size of a foot.
Answer:
The shaded area is 
Step-by-step explanation:
we know that
The shaded area is equal to the area of the large square minus the area of the two smaller squares
so

Calculate the shaded area
Remember that

substitute

Correct option is
Correct option isC
Correct option isC3(2x+1)
Correct option isC3(2x+1)(fog)(x)=f(g(x))=2(3x+2)−1=6x+4−1=6x+3=3(2x+1)
Is there a picture i could see?