Write the equation of a circle with a center at (5,-3) and a radius of 9. *
A. (X-5)2+(y-3)2=3

B.(x-5)2+(y+3)2=18

C. (X-5)2+(y+3)2=81

D.(x+5)2+(y-3)2=81

E.(x+5)2+(9-3)2=18