math ext help (1 Viewer)

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How do I do this? Also I don't understand what the question is trying to ask. Help needed urgently, thanks
 

jimmysmith560

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Would the following working help?







Here, denotes the solution being poured into the tank, while refers to the rate at which the solution is poured into the tank.

Similarly, refers to the element flowing out of the tank. It is determined by dividing mass by the changing volume, leading to .

denotes the rate at which the mixture flows out of the tank.

I hope this helps! :D
 

cossine

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How do I do this? Also I don't understand what the question is trying to ask. Help needed urgently, thanks
Also I don't understand what the question is trying to ask?

So the question is telling you to construct a differential equation that can model the amount salt in the tank per time t. A differential equation is equation involving some rate of change or in other words derivative.

Generally for these type of question you need experience or sometimes scientific background to construct a differential equation like in projectile motion.
 

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