Question 957487
volume = area of base x height
<pre>
     V = (area of base)(h)


Since the base is a square its area is s², and each side 
of the square base will be an edge of the base of the 
right prism.

     V = s²h

   128 = s²(8)

Divide both sides by 8

    16 = s²

Take square roots of both sides

   &#8730;<span style="text-decoration: overline">16</span> = &#8730;<span style="text-decoration: overline">s²</span> 
   
     4 = s

Answer = each edge of the base of the right prism is 4 cm

Edwin</pre>