Answer:
14.13
Step-by-step explanation:
use the radius, 3 squared
so 3 x 3 = 9
9 x 3.14 = 28.26
28.26 / 2 ( because it is a semicircle) = 14.13
(A ∩ B) means "A intersection B". Your problem statement tells you the intersection contains
{3, 4}
Y=cos(2x+pi) - 2
y= - cos(2x) - 2
{ Since cos(x+pi) =-cos(x)}
First, enter the variables into the expression.
Square 1/3 and -6 to get this:

Divide 36 by 2/3:

Subtract 54 from1/9 to get the final answer:

, which is option D.
Hope this helps!