I have no idea how to do this please help and I will mark you as brainliest

Answer:
113.098
Step-by-step explanation:
Area of a semicircle is πr^2 / 2
so π*144 / 2
which is 226.195
area of smaller circle is:
π*36 (r=6)
that is 113.097
226.195-113.097 is
113.098