Can anyone answer this for me? Desperate right now.

Answer:
unshaded area is 8 times bigger than shaded region
area of semi circle =2πcm²
area of circle =16πcm²
now,
let the shaded region be x times bigger
again
16πcm²=2πcm²*x
x=16πcm²/2πcm²
x=8
Step-by-step explanation: