How to compute the volume of this object via integration?

Why is it so hard to find the roots of polynomial equations?

Is there a general formula for solving 4th degree equations (quartic)?

Why does Benford's Law (or Zipf's Law) hold?

Proof of Angle in a Semi-Circle is of $90$ degrees

How is the Riemann integral a special case of the Stieltjes integral?

Determinants and volume of parallelotopes

Least wasteful use of stamps to achieve a given postage

Useful examples of pathological functions

What does it mean to be going 40 mph (or 64 kph, etc.) at a given moment?

What are NP-complete problems and why are they so important?

How to calculate a heading on the earths surface?

Sum of the alternating harmonic series $\sum_{k=1}^{\infty}\frac{(-1)^{k+1}}{k} = \frac{1}{1} - \frac{1}{2} + \cdots $

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