Can you guys help me???

99 points at a zoo, the leopard pen has a ring-shaped sidewalk around it. the outer edge of the sidewalk is a circle with a radius of 12 m. the inner edge of the sidewalk is a circle with a radius of 8 m. (1 point for showing all of your work) a. write and simplify an expression for the exact area of the sidewalk. (1 point for the answer) b. find the approximate area of the sidewalk. use 3.14 to approximate π. (1 point for the answer)

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

How many square centimeters of wrapping paper will be used to wrap the shoe box?