The length of each edge of a cube is decreased by 40%.By what percent does the volume of the cube decrease? Express your answer to the nearest tenth.
due : tonight at AoPS
+357 No. I refuse to help you do AoPS homework. If you are TRULY confused, there is an option to ask your peers.
X=original side
original volume= x *x*x= x^3
new volume = .6x * .6x * .6 x = .216x^3. You should be able to take it from here, 
+107 well you already did it guest, now we can find what percentage 0.216x^3 is from x^3.
0.216/ 1 = 21.6%
