Answer:
86.13mm^2
Step-by-step explanation:
Since there is already an answer posted I just wanted to post an explanation on why the answer is 86 mm^2.
Area of the Rectangle=
12*6=72 mm^2
Area of semi circle=
(3.14*3^2)/2=14.13 mm^2
if you add those two up, you will get an area of 86.13 mm^2 or rounded down to 86 mm^2.
