Does someone know how to do this!

Answer:
33[tex]\pi[/tex]
Step-by-step explanation:
The formula for area of circle is [tex]\pi r^{2}[/tex].
Area of Circle X = [tex]\pi x 7^2[/tex] = 49[tex]\pi[/tex]
Area of Circle Y = [tex]\pi[/tex] x 4^2 = 16[tex]\pi[/tex]
Difference = 49[tex]\pi[/tex] - 16[tex]\pi[/tex] = 33[tex]\pi[/tex]