Question 797848
A circle has a center (0,0) and radius 6 units
a) Find the equation of the circle
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The equation of a circle or radius r, center at (h,k) is
{{{(x-h)^2 + (y-k)^2 = r^2}}}
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b) Find the value of b if (4,b) is on the circle
Sub 4 for x in the equation, solve for y.