(a) By the formula for the area of a square, the answer is [tex]16^2 = 256[/tex] square km
(b) By the formula for the area of a circle, the answer is [tex](\pi)\left(\frac{16}{2} \right)^2 =64\pi[/tex] square km
(c) Subtracting areas, we get [tex]256-64\pi[/tex] square km
