Outsourcing of Jobs  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 ≤ t ≤ 4) where N(t) is measured in millions.† How fast was the number of U.S. jobs that were outsourced changing in 2007 (t = 2)? (Round your answers to the nearest whole number.)

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Differential Equations

Have you ever observed the movement of the satellites and rockets or how the planets go around the sun in their orbits? How will you determine their motion? Definitely they follow some scientific laws and these kinds of problems are framed as differential equations.