Find the Center (H, K) and Radius R of the Circle

Multiple Choice

Find the center (h, k) and radius r of the circle with the given equation.
- $$x ^ { 2 } + y ^ { 2 } - 4 x + 8 y = 29$$

A) $( \mathrm { h } , \mathrm { k } ) = ( 4 , - 2 ) ; \mathrm { r } = 49$
B) $( \mathrm { h } , \mathrm { k } ) = ( 2 , - 4 ) ; \mathrm { r } = 7$
C) $( \mathrm { h } , \mathrm { k } ) = ( - 2,4 ) ; \mathrm { r } = 49$
D) $( \mathrm { h } , \mathrm { k } ) = ( - 4,2 ) ; \mathrm { r } = 7$