Question 1044957
A cube, by definition, has six equal squares. This means that all the sides measure the same.
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In your problem, the sides are 3^4 and if you do it in your calculator you get 81 so each edge of the cube measures 81 (I use edge instead of side so as not to confuse with face. Each of the six squares of the cube is a face)
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The formula for the volume of the cube is very simple, the name says it all: it's edge (or side if you like it better) cubed:
81<sup>3</sup>
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Happy learning,
John