An inverted pyramid is being filled with water at a constant rate of 35 cubic centimeters per second. The pyramid, at the top, h
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and is all you can simplify from it.
so... all we did, was rationaliize it, namely, "getting rid of the pesky radical at the bottom", we do so by simply multiplying it by something that will raise the radicand, to the same degree as the root, thus the radicand comes out.