11)How many common tangents do the circles share?
12)What is the distance from point A to point B?
13)what is the circumference of Circle B

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

25/6

step-by-step explanation:

you multiply 4 by the denominator (4*6=24) and add it to the numerator which makes it 25/6.