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Interval of r for which x^2 + y^2=r^2 and x^2 + y^2 - 6x - 8y + 9=0 cut at

Interval of r for which x^2 + y^2=r^2 and x^2 + y^2 - 6x - 8y + 9=0 cut at two distinct points is A) (2,12) B) (2,10) c) (1,8) D) (1,9)

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