Question 22
James plans to decorate his garden with flower. A circular fountain has the equation $x^2+y^2-24x-32y+175=0$ and flowers are planted in a 2 units wide ring around the fountain. Find the difference between fountain area and flower area in term of $\pi$? (circle in standard form $(x-h)^2+(y-k)^2=r^2$, r = radius)