B is correct 2x2=4x3=12x3=36
A ratio compares two values using the operation division. It <span> is a relationship between two numbers indicating how many times the first number contains the second. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
C = 2(pi)r....so we are looking for the radius (r)
42 = 2 * 3.14 * r
42 = 6.28r
42/6.28 = r
6.69 = r <===
First get all the terms on the same side:

Now solve using the quadratic formula which is:

Plug in the values:

So the answer is: