Answer: a.) Circle B
b.) 9.42
Explanation:
A diameter of 9 cm means that the circumference of Circle A is approximately 28.26 cm.
Circumference = Diameter x π
9 x 3.14 = 28.26
A radius of 6 cm means the circumference of Circle B is approximately 37.68 cm.
Circumference = 2 x Radius x π
2 x 6 x 3.14 = 37.68
37.68 > 28.26
37.68 - 28.26
For these types of problems, I recommend numbermaniacs.com .
Have a nice day!