I hope it’s right?! You just need to do this
Answer:
-3
Step-by-step explanation:
Answer:

Step-by-step explanation:
Radius of the internal circle 
Radius of the external circle 
Area of the shaded region = Area of external circle - Area of internal circle.

Answer:
36 Inches
Step-by-step explanation:
Answer:
6.67
Step-by-step explanation:
20/3=6.6666666
Rounded to two decimals is 6.67
(the 6 is rounded up because it is above 4)