Answer:
[tex]A=351.68\ cm^2[/tex]
Step-by-step explanation:
we know that
The area of the shaded region is equal to subtract the area of the smaller circle from the area of the larger circle
so
[tex]A=\pi(r_b^2-r_a^2)[/tex]
we have
[tex]r_b=11\ cm[/tex] ----> radius of large circle
[tex]r_a=3\ cm[/tex] ----> radius of smaller circle
assume
[tex]\pi=3.14[/tex]
substitute
[tex]A=3.14(11^2-3^2)=351.68\ cm^2[/tex]
