1) If the radius is 5 units, then the diameter is 10 units. Therefore, the circumference is approximately 31 units (10 x 3.14 = 31.4, rounded to the nearest unit).
2) The formula for circumference is C = 2πr, where r is the radius. Therefore, C = 2 x 3.14 x 4 = 25.12 inches (rounded to the nearest hundredth).
3) If the radius is 6 units, then the area is approximately 113 units (6 x 6 x 3.14 = 113.04, rounded to the nearest unit).
4) The figure is a rectangular prism.
5) Surface area is the sum of the areas of all the faces. If the width is 4 units, the length is 6 units, and the height is 3 units, then the surface area is 2(4 x 6) + 2(3 x 6) + 2(3 x 4) = 48 + 36 + 24 = 108 square units.
6) The volume of the sandbox is the area of the base (7 x 7 = 49 square feet) times the height (2 feet). Therefore, Jamilla needs to order 98 cubic feet of sand.
7) The wrapping paper needed is the sum of the area of all the faces. If the box has dimensions of 8 inches (length) x 6 inches (width) x 4 inches (height), then the wrapping paper needed is 2(8 x 6) + 2(4 x 6) + 2(4 x 8) = 96 + 48 + 64 = 208 square inches.
8) The volume of the rectangular prism is the base area (12 cm2) times the height (8 cm). Therefore, the volume is 96 cm3.