816.8689=4/3*3.14*r^3

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Solution for 816.8689=4/3*3.14*r^3 equation: 


r in (-oo:+oo)

816.8689 = 3.14*(4/3)*r^3 // - 3.14*(4/3)*r^3

816.8689-(3.14*(4/3)*r^3) = 0

816.8689-4.18666667*r^3 = 0

-4.18666667*r^3 = -816.8689 // : -4.18666667

r^3 = 195.11199825

r^3 = 195.11199825 // ^ 1/3

r = 195.11199825^(1/3)

r = 195.11199825^(1/3)

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