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23 votes
23 votes
4. A circle is represented by the equation x^2 + (y-3)^2 = 13. What are the coordinates of the center of the circle and the length of theradius?

User Takara
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1 Answer

8 votes
8 votes

\begin{gathered} (x-h)^2+(y-k)^2=r^2 \\ x^2+(y-3)^2=13 \\ \text{Center (h,k)} \\ \text{Center (0,3)} \\ r^2=13 \\ r=\sqrt[]{13} \\ \text{The center is (0,3) and the radius is }\sqrt[]{13} \end{gathered}

User Teddy Sterne
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