Find the equation of the sphere centered at (-6,-7,-1) with radius 9.(adsbygoogle = window.adsbygoogle || []).push({});

well i got [tex](x+6)^2 + (y+7)^2 + (z+1)^2-9^2[/tex] which is correct.

now for the next question:

Give an equation which describes the intersection of this sphere with the plane [tex]z=0[/tex].

i dont understand how to do the second question at all, can someone help?

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# Homework Help: Find the equation of the sphere

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