Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2vQ/ Traduzione in Italiano del video Understanding Exponents 2 http://www.youtube.com/watch?feature=player_embedded&v=5qfOViJda_g http://www.khanacademy.org/math/algebra/exponents-radicals/v/understanding-exponents-2 Help us caption & translate this video! http://amara.org/v/B2vQ/