The circumference of circle b is 48. the circumference of circle a is 12. how many times greater is the area of circle b to the area of circle a

Circumference = 2(pi)(radius)

Circle 1: 48=2(pi)(radius)
              24/pi = radius

Circle 2: 12 = 2(pi)(radius)
                6/pi = radius

Area = (pi)(radius)^2

Circle 1: A = (pi) (24/pi)^2
                  = 576 / pi

Circle 2:  A = (pi) (12/pi)^2
                  = 144 / pi

576/144 = 4 times greater

40 & 50 in the right corner are the complementary angles as when placed in a sum (added together) they make 90°