A company's revenue from selling x units of an item is given as R = 1700z – z². If sales are increasing at the rate of 20 units per day, how rapidly is revenue increasing (in dollars per day) when 640 units have been sold? Preview dollars per day

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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.