SOLUTION: I'm not sure how to solve. It asks "What is the circumference of a circle with the equation x^2 + y^2=81?"
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Question 443902: I'm not sure how to solve. It asks "What is the circumference of a circle with the equation x^2 + y^2=81?"
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
the radius (squared) is in the equation ___ use it (with pi) to find the circumference
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