What even is that I have never seen anything like that
The answer is 3 cm.
Circle A's diameter is 27, right? However, circle A is 3 times the value of the area of B. Because of that, you need to do 27/3, the inverse, in order to get the diameter of circle B.
Next, because radius is half of the diameter, you do 9 divided by 3 or 9 times 1/2.
1st transformation:

2nd transformation:
When you rotate a point around the origin by 180 degrees, you change both coordinates to opposite values.
The answer you want is going to be A)
, because all you have to do is add the exponents which -4+-10 would be -14 so therefore the answer you want is going to be A) 