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The volume of a grain of sand is about 6.2 x 10^-2 ___If a cylindrical bucket has a radius of 100 mm and a height of 200 mm, then the volume of the bucket is ____mm³. This means that there are about ____ grains of sand in the bucket. Assuming that the bucket weighs about 21 pounds, the weight of a grain of sand is about ____ pounds. If there are 100 pounds of sand in a typical playground sandbox in there are about ___ grains in typical playground sandbox
(Use scientific notation. Use the multiplication symbol in the math palette as needed. Round to two decimal places as needed.)