Data indicates that the percent change in beer shipments since the year 2007 for a beer company can be approximated by y=−4.2x+29.4 where x=7 corresponds to the year 2007. Assume the model remains​ accurate, and find the first full year in which the percent change reaches −31​%. What does the value −31​% represent in the given​ equation? The first full year in which the percent change reaches −31​% is.

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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.