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The volume of a cube is 125 . Find the length of the edge of the cube.

Teacher's comment: Count and find out what number when multiplied by 3 will give you 125.

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Related questions

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If V is the volume of a cube with edge length x and the cube expands as time passes . Find in terms of .

Menaechmus (ca 350 B.C.) was another student in Plato’s academy. He discovered the conics: the ellipse, hyperbola, and parabola. These arise as points of intersection of planes passing through right circular cones (or pairs of cones). Plato insisted that geometric prob- lems should have straight edge and compass constructions. It was shown much later (in 1837 by Pierre Wantzel) that it is not possible to double the cube by ruler and compass constructions only. But Menaechmus described a simple way of using his conics to double a cube: √3 3 (i) Show that if we want to double a cube, it suffices to find 2, that is to solve x = 2. (ii) Show (i) arises by finding the intersection of the parabola y = 1x2 with the hyperbola 2 xy = 1.

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