Find the length of the common chord of x2+y2=16x^2 + y^2 = 16x2+y2=16 and x2+y2−8x−6y=0x^2 + y^2 - 8x - 6y = 0x2+y2−8x−6y=0.
4.84.84.8
5.25.25.2
6.46.46.4
7.27.27.2