#### Answer

$(x-1)^2 + (y-2)^2 + z^2 = 33$

#### Work Step by Step

Equation for a sphere with $(a,b,c)$ as the center and has radius $r$
$(x-a)^2 + (y-b)^2 + (z-c)^2 = r^2$
Plugging in the center:
$(x-1)^2 + (y-2)^2 + (z-0)^2 = r^2$
Plug in point ($3,4,5)$
$(3-1)^2 + (4-2)^2 + (5-0)^2 = 4 + 4 + 25 = 33$