Oil spilled from a ruptured tanker spreads in a circle whose area increases at a constant rate of 8 square miles per hour. How rapidly is radius of the spill increasing when tw area is 2 square miles? Round to the nearest hundredth mile per hour.

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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.