If the question refers to the area (A) of a circle then the formula is A = πr

The larger circle has a radius of 7 and thus an area of π7

The smaller circle has a radius of 6 and thus an area of π6

^{2}.The larger circle has a radius of 7 and thus an area of π7

^{2}The smaller circle has a radius of 6 and thus an area of π6

^{2}The difference in area is π(7^{2 }- 6^{2}) = π(49 - 36) = 13π = 40.84 in^{2}