14 posts tagged with math and formula.
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Help with Excel formula to compare 1 column of numbers to other columns.

I have an excel sheet with 4 columns of numbers. The first column is a recent donation amount. The other three columns were the prompts of donation amounts, (the Reach, the Target, and the Anchor). Is there an excel formula that can compare these four columns? [more inside]
posted by andoatnp on Jul 19, 2016 - 8 answers

Help me figure out this number-of-combinations problem

Supposing you have a set of N number of questions to choose from for creating a test. Your test must have a minimum of 1 question but can have all N. How many unique tests could you create? Am I correct to assume the formula is 64! (factorial)? 64 x 63 x 62 x 61...
posted by postergeist on Feb 13, 2016 - 6 answers

How do I solve for a percentage of a total budget...

This will be easy for someone, but math is my second language so I'm at a loss. How do I solve for the percentage of a TOTAL budget, when one line item is unknown (and is part of the total budget)? [more inside]
posted by coollibrarian on Dec 9, 2014 - 5 answers

How do I calculate combined percentages?

Mathfail: I'm considering supplementing my cat's food with plain meat. I'd like a rough idea of how much it would bump percentage of calories from protein and fat. [more inside]
posted by moira on May 10, 2014 - 6 answers

I need to be able to memorize several formulas for a test next week

I'm taking a numerical methods class and there are all these discretization schemes of partial differential equations named after pairs of dudes and they all are kinda the same, maybe a bit different in indexes.... I'm trying to organize it all in my head, like a frat house, with the dudes that worked on the same scheme being roommates, but it seems to be taking a long time to actually "find" a place for each scheme in their "rooms" and keeping it there in a sort of visual arrangement. Test is no books no notes, and everything kinda of just jumbles inside my head right now.
posted by spacefire on Dec 11, 2013 - 10 answers

If I Knew the Answer, I Could Probably Give the Question a Good Title

Is there a formula for determining (eg.) how many tracks would fit on a TT 79:57 CDR where the first track was one second, and subsequent tracks added 1 second each? (00:01, 00:02, 00:03, 00:04, &c) [more inside]
posted by herbplarfegan on Dec 10, 2012 - 7 answers

Turning user input into pie (charts)

WordPressFilter: I'm looking for a plugin/widget/codesnippet that will allow me to create a graph using input from the user. [more inside]
posted by antonymous on Nov 27, 2012 - 5 answers

What does a bivariate cubic polynomial look like?

What does a bivariate cubic polynomial look like? [more inside]
posted by tybeet on Jul 13, 2011 - 9 answers

Does this tattoo equation mean to you what I mean it to?

Math and science geeks, does this fake equation make sense? 'delta' = c ... meaning "change is constant". [more inside]
posted by attercoppe on May 15, 2011 - 33 answers

Formula for figuring poker winnings

I need help untangling a formula for tracking poker winnings. All this math is making my head hurt! Totally legal details within. [more inside]
posted by c:\awesome on Oct 7, 2010 - 8 answers

Reverse my percentage?

How do you find a number that minus a percentage of itself is a certain number? [more inside]
posted by JulianDay on Dec 6, 2009 - 7 answers

Help, Please - I'm an Excel Moron

I have to create an excel sheet to keep track of a book budget - in the most basic terms, I will have a total budget figure, and I want to subtract invoice figures to keep a running total. Here's an example of what I want the sheet to look like: http://i109.photobucket.com/albums/n46/coollibrarian/excel.jpg The simpler the better. [more inside]
posted by coollibrarian on Jul 26, 2008 - 7 answers

Formulas for Food

Looking for math formulas involving food. [more inside]
posted by JaySunSee on Aug 4, 2007 - 5 answers

Where can I find fomulas for calculating coordinating colors?

Where can I find mathematical fomulas for calculating coordinating colors for interior decorating projects? [more inside]
posted by Vorteks on Oct 20, 2006 - 10 answers

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