Given a circle with measures of (C, d, and r) and a circle with measures of (C', d', and r), what is r if c/c’ = 5 and d' = 20? A)10

B)25

C)50

D)100

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.