Find the center (h, k) and radius r of the circle with the given equation. x2 + y2 = 4
A. (h, k) = (0, 0); r = 4
B. (h, k) = (2, 2); r = 4
C. (h, k) = (0, 0); r = 2
D. (h, k) = (2, 2); r = 2
Answer: C
Mathematics
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