Answer: The answer is 31.
Step-by-step explanation: You have to find the area of the rectangle first by multiplying 12 with 2 which gives you 24. Then you have to find the area of the semi circle through the formula 1/2 x
x radius squared which gives you 6.28 and you round that to 6.9. Then you add 24 and 6.9 to get 30.9 and then you round that to get 31.