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Mathematics 19 Online
OpenStudy (anonymous):

What is the standard equation of a circle at the origin? A. x^2-y^2=r^2 B. x^2+y^2=r^2 C.x^2+y^2=r D.X^2-y^2=r

OpenStudy (anonymous):

thank you!!!

OpenStudy (shamim):

b

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