The cumulative number of jobs outsourced overseas by U.S. based multinational companies in year t from 2005 (t=0) through 2009 is approximated by N(t) = -0.05(t+1.1)^2.2 +0.7t+0.9 (0 less than equal to t ;ess than equal to 4) where N(t) is measured in millions . + How fast was the number of U.S jobs that were outsourced changing in 2008 (t=3)? (Round your answer to six decimal places.) million per year