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 Apr 2 comment Longitude of the Ecliptic ccar.colorado.edu/asen5050/projects/projects_2015/Students/… may or may not be helpful, as may this google search google.com/… Apr 2 comment Longitude of the Ecliptic I can't tell if you're joking, but "mods" meant "moderators", not "modulo" :) Apr 2 comment Best Fitting Pipe in parabolic trench I like the use of the second derivative in a pre-calculus problem :) Apr 2 comment Best Fitting Pipe in parabolic trench Drawing a diagram is always a good start. Apr 2 comment Longitude of the Ecliptic Mods, consider migrating to astronomy.stackexchange.com for more attention. Apr 1 comment Difference beteween ANOVA and ANCOVA If you don't get an answer here, try stats.stackexchange.com Apr 1 comment another follow up question: modeling with exponential distributions Am I doing the math right? Does the total time simplify to 3/(lambda1+lambda2)? Mar 31 comment Outstanding balance and amount of interest You're right, I'm wrong. I thought amortization would have an effect on annual interest, but it turns out it doesn't. You always pay the same rate of interest on the outstanding balance. Mar 31 comment Outstanding balance and amount of interest OK, to me, level annual payments means each payment must be the same amount, like in a mortgage or other amortization situation. Mar 31 comment Outstanding balance and amount of interest I might be misunderstanding your answer. What do you think each payment amount would be, if not 80? Mar 31 comment Outstanding balance and amount of interest OK, but if it's being repaid with level annual payments, then the next payment would be $80 as would all future payments, even though the balance is decreasing (unless it's an "in perpetuity" loan). We probably do need the total number of payments to work this out though. Mar 31 comment How to get the distance in meters from the center of a parabolic image to a point? It would be nice to have some distances here. What is the configuration of the soccer field (ie, how much distance between the various lines and circles we're seeing)? Mar 31 comment Counting question about substrings Please show your work so far and where you have gotten stuck. Mar 31 comment Outstanding balance and amount of interest This sounds like an amortization problem. Mar 31 comment Motivation for Non-Euclidean geometry: relativity A non-relativity motivation for non-Euclidean geometry is the big blue round thingy we live on. Mar 31 comment Distance between a point and a 3D figure You could write a formula for the surfaces, compute the distance from the point to each point on the surface, and minimize using calculus (+ other techniques where the surface is non-differentiable) Mar 31 comment Not sure what I'm doing wrong with this recurrence problem @OmarWali Could you add your comment to the main question by editing the question? Also, did you mean you multiplied both sides by x^2 and not x^n? Mar 30 awarded Yearling Mar 30 comment Closed Form of$ \int_{0}^{\pi} x^3\ln^8(2\sin{(x)}) dx$arminstraub.com/software/lstoli may or may not help. Mar 30 answered Closed Form of$ \int_{0}^{\pi} x^3\ln^8(2\sin{(x)}) dx\$