What are the center and radius of the circle defined by the equation * + y2 - 6x +By+21-0?
O A. Center (-3, 4); radius 2
O B. Center (3.-4); radius 4
O C. Center (-3, 4); radius 4
D. Center (3,-4); radius 2

mk./km: lm

step-by-step explanation:

,mlmlm

; mk

lk

c

c

c

c

c

c

c

cc

c

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

113.1

step-by-step explanation:

v=4

3πr3=4

3·π·33≈113.09734