derivative

I think, calculus teaches you a lot more than you might imagine.

For example, it teaches me when to stop studying. Basically, its when d(grades) / d(time spent) is too low, to make a difference. And actually, thats true for a lot of other things as well.

Studying is like a curve. The first part of the curve is quite steep, so you have to study, otherwise you'll really fail badly.

But come to some point, its better to go do something else with your time.

Fortunately, as I write this, I'm still in the first part of the curve, so I think I'll go do some more studying.