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The surface area A of a sphere of radius R is given by the equation A = 4pi*R2, where pi equals 3.1416 (to 5 digits). Calculate the area of a sphere which has a radius of 2 m.
If 2600 grains of sand are uniformly spread out on the surface of the sphere, how many grains of sand are there on each square meter? HINT: We need to divide the number of grains of sand by the number of square meters of the sphere's surface.
If 2600 grains of sand are uniformly spread out on the surface of the sphere, how many grains of sand are there on each square meter? HINT: We need to divide the number of grains of sand by the number of square meters of the sphere's surface.
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