Answer:
Ok so what you should is first find the area for both of the circle
![Area = \pi r^2\\](https://img.qammunity.org/2022/formulas/mathematics/high-school/u1gvaxm0m2oui1vdc4jhj9rblpw7god6o4.png)
Big circle
you are given the radius which 14mm
![3,14(14)^2 = 615.44 mm^2](https://img.qammunity.org/2022/formulas/mathematics/high-school/fobss5jsiyg8nspa54n4a6deq3jmmceljz.png)
Small circle
you are given the diameter of the small circle which 14mm
radius = diameter/2
14/2=7mm
![3.14(7)^2 = 153,86mm^2](https://img.qammunity.org/2022/formulas/mathematics/high-school/uxebmucn275awkyfh5gzg88aexaoathj69.png)
Shaded area means the difference between the 2 areas, in my opinion
so you do 615.44 - 153.86 = 461.58 mm^2
Hope that answers your question
Don't hesitate to comment if you are confused about something :)
Explanation: