Help if you dont mind

We Find the Area of circle with this formula:
A= πr^2
If we find the area of circle it will be:
A=3.14 x (4cm)^2=3.14 x 16cm^2=50.24cm^2
Now if we find the area of the rectangle it is:
A=3cm x 2cm=6cm^2
And finally, we have subtract the area of rectangle from the area of circle
A(shaded)=50.24cm^2 - 6cm^2= 44.24cm^2
I hope this helped! Good luck :)