(D)
(A) The required area is lined in the figure below.
Intersections: ;
Let r 1 = 3 sin θ and r 2 = 1 + sin θ, then the area of the shaded region is
(D) Note that f (x) = x + 6 if x ≠ 6, that f (6) = 12, and that So
f is defined and continuous at x = 6.