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seen May 19 at 7:47

Mar
8
awarded  Yearling
Apr
20
comment Distance between the two points $P$ and $Q$
Yes, they are. Here is the general formula: $d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
Apr
3
comment Volume by cross-section of a donut
Guys, I am sorry for not correct answer at first.. I am at work and distracted a lot. Everything is correct now.
Apr
3
revised Volume by cross-section of a donut
added 148 characters in body
Apr
3
revised Volume by cross-section of a donut
added 233 characters in body
Apr
3
revised Volume by cross-section of a donut
added 233 characters in body
Apr
3
comment Volume by cross-section of a donut
You must have an error in your calculations, you can post them and we'll check or I can write my owns.
Apr
3
answered Volume by cross-section of a donut
Apr
2
comment How to find the least positive root?
WolframAlpha might be a handy tool too. You can get pretty accurate approximations of roots by just typing your equation.
Apr
1
comment How to find $\frac{d^2x}{dy^2}$
I had to tilt my head to read your answer :D
Apr
1
answered Integration with pdfs and cdfs
Apr
1
answered Geometric Interpretation for Definite Integrals with $\pi$ in the result
Mar
29
comment Introductory Level Books for Graph Theory
math.stackexchange.com/questions/27480/…
Mar
29
comment Probability Dice Problem
Your solution is not quite right. I don't even understand what it tries to calculate.
Mar
29
awarded  Custodian
Mar
29
reviewed Reviewed Real analysis textbok that develops the subject in a self-motivated, coherent fashion?
Mar
28
revised Find the maximum dimensions that will strengthen rod
added 3 characters in body
Mar
28
revised Find the maximum dimensions that will strengthen rod
added 39 characters in body
Mar
28
answered Find the maximum dimensions that will strengthen rod
Mar
28
awarded  Critic