f (x) = -9.644 + 20.907 ln x is a function that models the number of international visitors in the United States where f (x) is in millions and x is the number of years from 1980. Use this function to estimate the number of visitors in 2002. Round answer to nearest hundredth.

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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.