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Answer:
C
Step-by-step explanation:
Since the circle is inscribed inside of the square, its diameter is the same as the side length of the square, or 8. This means that the radius is 8/2=4. The formula for the volume of a circle is [tex]\pi r^2[/tex], or in this case [tex]3.14\cdot 4^2=50.24[/tex]. The area of the square is 8*8=64 square feet. 50.24/64 is equal to 78.5%, or answer choice C. Hope this helps!