Question 675130
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Hi
Standard Form of an Equation of a Circle is {{{(x-h)^2 + (y-k)^2 = r^2}}} 
where Pt(h,k) is the center and r is the radius
x^2+y^2-10y-24=0   ||Putting in standard form
x^2  +y^2-10y +25 = 24 + 25
{{{x^2 + (y-5)^2 = 49 = 7^2}}}   C(0,5)  and r = 7