Give the coordinates of the circle's center and its radius. $x ^ { 2 } + y ^ { 2 } - 64 = 0$
A)(1, 1); r = 64
B)(0, 0); r = 8
C)(1, 1); r = 8
D)(0, 0); r = 64
E)none of these

Question

Give the coordinates of the circle's center and its radius.  $x ^ { 2 } + y ^ { 2 } - 64 = 0$ 
A)(1, 1); r = 64
B)(0, 0); r = 8
C)(1, 1); r = 8
D)(0, 0); r = 64
E)none of these

Quizplus · Accepted Answer

The given equation is in the form $x^2 + y^2 = r^2$, which represents a circle centered at (0, 0) with a radius $r$. Solving for $r^2 = 64$ gives $r = 8$, making the correct answer (0, 0); r = 8.

Give the Coordinates of the Circle's Center and Its Radius x2+y2−64=0x ^ { 2 } + y ^ { 2 } - 64 = 0x2+y2−64=0

Give the Coordinates of the Circle's Center and Its Radius $x ^ { 2 } + y ^ { 2 } - 64 = 0$