In 1980, direct u.s. business investment abroad was about 13.5 billion dollars.  From 1980 through 2010, that investment grew at an average annual rate of 11.24%. a) Make a exponential model that shows the u.s. direct investment abroad A, in billions of dollars, t years after 1980. A(t)=   b)From 1980, how long did it take (in years) for the u.s. investments abroad to double. Round answer to 2 decimal places.

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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.