The supply and demand functions for a product are S x)( = 3x + 9 and D x)( = 30 − 4x respectively, where x represents units of quantity. Compute consumer’s surplus and producer’s surplus.

Q: What formula did you use for demand

A: What formula did you use for demand?

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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.