Mathematics, 30.07.2019 09:00, tabbic

At a zoo, the lion pen has a ring-shaped sidewalk around it. the outer edge of the sidewalk is a circle with a radius of 11 m. the inner edge of the sidewalk is a circle with a radius of 9 m. ⦁ write and simplify an expression for the exact area of the sidewalk. ⦁ find the approximate area of the sidewalk. use 3.14 to approximate π

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At a zoo, the lion pen has a ring-shaped sidewalk around it. the outer edge of the sidewalk is a cir...