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Math Question #1
Can anyone tell me what this equation means?



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Took calc with an A...
But still am unsure what this is.
I'm venturing that it is the formula for a circumference of a circle given radius r.

But if r is constant, why bother integrating?

I've used integration to find total area under graphs, especially between two x-coordinates. However the lack of coordinate data has me scratching my head. It is still something circumferential, I do maintain, but it looks unexessarily complicated to be "C = πd."

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