The Monroe Doctrine<span> was </span>important<span> because it stated that the newly independent United States would not tolerate European powers interfering with the nations in the Western Hemisphere, and if the European powers did interfere, then the United States would retaliate with war.
*Hope this helps</span>
Advances in technology, new industries, growth of cities and new forms of transportation.
Answer:
Remember that the volume of a cube is: a³, or that number, three times!
This means that each side, should be 4cm.
Why? It's because, now that we know the formula, 4x4 is equal to 16, and then 16x4 is equal to 64! :D