1. The problem statement, all variables and given/known data
A circle in a xy coordinate system is given. The equation of the circle is unknown. The circle touches the x axes at (3,0). It also passes through the point B (0,10). Calculate the length of the circle radius?
2. Relevant equations
(xp)^2 + (yq)^2 = r^2
3. The attempt at a solution
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