The differential equation for a mixing problem is x' + 0.08x = 4, where x is the amount of dissolved substance, in pounds, and time is measured in minutes. What are the units of 4? Choose the correct answer and explain in one sentence. (a) pounds (b) minutes (c) pounds/minute (d) minutes/pound (e) None of the above

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Set Theory

Every field in the present world involves a set. The theory of sets was developed by German mathematician Georg Cantor while working on the “problems of trigonometric series”.