Find the area of the shaded region below given the center of the circle is (9, 4). Leave the answer in exact form.

we have that
the area of the shaded region is equal to the area of rectangle minus the area of the circle
step 1
Find the area of the circle
A=pi(r^2)
we have
r=4 units
substitute
A=pi(4^2)
A=16pi unit2
step 2
Find the area of rectangle
A=b*h
we have
h=2(4)=8 units
b=9+4=13 units
substitute
A=13(8)
A=104 unit2
therefore
the area of the shaded region is