Mark Eichenlaub
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 Sep19 comment Demystify integration of $\int \frac{1}{x} \mathrm dx$ I wrote this blog post about it a while ago. arcsecond.wordpress.com/2011/12/17/… My blog says people followed a link from here to there, but I can't find that link on this page, so here it is. It takes a picture-based approach to the problem. Feb17 awarded Popular Question Feb14 awarded Popular Question Feb9 awarded Great Answer Feb4 awarded Good Answer Feb2 answered Cannot understand this part from the textbook Jan31 awarded Good Answer Jan31 awarded Mortarboard Jan31 comment Unusual 5th grade problem, how to solve it @gmline This wasn't supposed to be a method for enumerating all the answers or anything like that; just a way to approach it visually that might help for some kids. Jan31 awarded Nice Answer Jan31 answered Unusual 5th grade problem, how to solve it Nov29 revised What's the expected value of a lottery ticket? spelling, minor edit Nov29 accepted What's the expected value of a lottery ticket? Nov29 suggested approved edit on What's the expected value of a lottery ticket? Nov29 comment What's the expected value of a lottery ticket? @cardinal I hadn't thought of it that way, but it's a good point and looks right to me, thanks. Nov29 comment What's the expected value of a lottery ticket? @FlybyNight $n$ is a random variable whose distribution is determined from $p$ and $t$. I believe you do have enough information. Nov29 awarded Critic Nov29 asked What's the expected value of a lottery ticket? Nov9 accepted Can there be a cubical bubble? Nov9 awarded Yearling