Since diagrams do not show up, I can only guess that they probably showed the shaded area as a ring or resembling a metal washer.
take area of large circle - area of small circle
= pi(R^2) - pi(R-3)^2
expand the second term, then simplify.
See if it matches one of the answers.
Both circles have the same center and radius of the larger cirlce is R. if the radius of the msaller circle is 3 units less than R, whic of the following represent the area of the shaded region?
1 answer