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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
reviewed Reviewed Help me, to solve this ??
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
answered Another related rates questions
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