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Answer:
64%
Step-by-step explanation:
If 8 of 22 are black, then 14 are not black. The fraction 14/22 can be converted to a percentage by multiplying by 100%.
14/22 × 100% ≈ 63.6_36... % ≈ 64% . . . . are not black
Answer: A. (72π - 144) mm²
<u>Step-by-step explanation:</u>
![A_{shaded}=A_{circle}-A_{square}\\\\\\A_{circle}=\pi \cdot r^2\\.\qquad \ =\pi \bigg(\dfrac{12\sqrt2}{2}\bigg)^2\\\\.\qquad \ =\pi (6\sqrt2)^2\\.\qquad \ =72\pi\\\\\\A_{square}=side^2\\.\qquad \quad =\dfrac{12\sqrt2}{\sqrt2}^2\\\\.\qquad \quad =12^2\\\\.\qquad \quad =144\\\\\\\large\boxed{A_{shaded}=72\pi-144}](https://tex.z-dn.net/?f=A_%7Bshaded%7D%3DA_%7Bcircle%7D-A_%7Bsquare%7D%5C%5C%5C%5C%5C%5CA_%7Bcircle%7D%3D%5Cpi%20%5Ccdot%20r%5E2%5C%5C.%5Cqquad%20%5C%20%3D%5Cpi%20%5Cbigg%28%5Cdfrac%7B12%5Csqrt2%7D%7B2%7D%5Cbigg%29%5E2%5C%5C%5C%5C.%5Cqquad%20%5C%20%3D%5Cpi%20%286%5Csqrt2%29%5E2%5C%5C.%5Cqquad%20%5C%20%3D72%5Cpi%5C%5C%5C%5C%5C%5CA_%7Bsquare%7D%3Dside%5E2%5C%5C.%5Cqquad%20%5Cquad%20%3D%5Cdfrac%7B12%5Csqrt2%7D%7B%5Csqrt2%7D%5E2%5C%5C%5C%5C.%5Cqquad%20%5Cquad%20%3D12%5E2%5C%5C%5C%5C.%5Cqquad%20%5Cquad%20%3D144%5C%5C%5C%5C%5C%5C%5Clarge%5Cboxed%7BA_%7Bshaded%7D%3D72%5Cpi-144%7D)