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For some of my smaller spaces I want to offer design by the square metre and enable my clients to work out my fee*, which will hopefully help them to pick up the phone. The aim is to present people with a simple function so they can do it themselves, e.g. if they've got say 225 square metres what will that cost them? I'm hoping to find something people as non-numeric as myself can punch into a calculator: area operation number operation number = $number [more inside]
posted by unearthed on Apr 13, 2024 - 4 answers

Help a biologist trying to do math and in over their head. I'm trying to do some modeling and would like to find the inverse of the equation f(x) = ln(|x|)/u - (ln(|vx-p|))/kv + C when 0<x<p/v. Is this possible? Can anyone point me to a solution or a resource where people good at math answer these types of questions? Stuck and really not sure who to ask. Thanks!
posted by 12%juicepulp on Jan 22, 2021 - 10 answers

I want my camera to have an unobstructed view of the night sky down to about 10° above the horizon. There is a large thunderstorm several counties away which my weather app tells me has cloud tops up to 60,000 feet / 18,250 meters. My camera is 5 feet / 1.5 meters off the ground. Assume that I am on a level plain with no other obstructions. How far away do I need to be from the storm so that its top is less than 10° above my camera’s horizon? What would be the equation for this?
posted by theory on Aug 13, 2020 - 3 answers

Modelling an exponential curve to fit a time history of tree sway data: a*exp(x*(t-t0))*cos(w*(t-t0)*pi/180)+b+c*(t-t0) [more inside]
posted by Alex Haist on Apr 12, 2020 - 6 answers

I'm working on some AI music algorithms and need mathematical curves on which to base certain aspects. What are the equations/names of some beautiful/interesting/unusual 2D function curves?
posted by Ain on May 10, 2018 - 10 answers

I'm writing a doctoral thesis in mechanical engineering. I will have lots of equations to write in my paper which need to be labeled with numbers. Throughout the body of the paper I will have to cross-reference those equation numbers in discussion. I am currently using the built in functionality in Word but it is not tailored for equation numbering and includes some very cumbersome and finicky workarounds. How do people handle this efficiently in their science/engineering papers? Are there 3rd party products that will do this for me automatically and update the numbers automatically for both the equations and cross-references to them? I am willing to spend money on a solution if need be. The solution must work with MS Word 2016 and I also need the ability work on the same document on two different computers' installs of Word 2016. Any help is appreciated.
posted by incolorinred on Apr 29, 2018 - 17 answers

I have $10000 to spend on plants (well I wish I did anyway). My plants come in two sizes which I'll call thing1 and thing2. [more inside]
posted by unearthed on Mar 5, 2018 - 4 answers

Asking for a friend: I have a question about how to work out a student's exam mark. Unit 1 is worth 60%, Unit 2 is worth 40%. Both units are marked out of 80. For example, a student scores 67/80 on unit 1 and 69/80 on unit 2. What is their overall mark? Thanks for any help!
posted by charlen on May 28, 2015 - 8 answers

Is there an equation for figuring out the average wait time for a book on hold at the library. Or how to figure out the average wait time I have left for a book I put on hold because I'm dying to read the rest of it. [more inside]
posted by gov_moonbeam on Oct 13, 2011 - 10 answers

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

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

I am wondering if there are generally accepted ways of getting the critical constants (acentric factor, critical pressure and temperature) of a substance from a simulation of some sort (i.e. quantum chemistry) [more inside]
posted by selenized on Apr 12, 2011 - 3 answers

What does it mean to raise a number to an imaginary power? [more inside]
posted by slappy_pinchbottom on Mar 16, 2011 - 29 answers

The solution to 12 = x - (square root of x) is 16, but how do I manipulate the equation to show that? [more inside]
posted by Wanderboy on Feb 23, 2011 - 46 answers

Math Filter: I am trying to find a name for this equation. I am not sure if I can solve it given the information that I currently have. [more inside]
posted by occidental on Jan 17, 2011 - 14 answers

I need help understanding the "principle domain" (a term only my professor seems to use) of a polar function. That is, how do I find the smallest value delta such that [0,delta] plots all of the unique points on the curve; any values greater than delta re-trace points. I suspect that if MeFi could identify the more common name for this, uh, procedure, I'd be set.
posted by phrontist on Aug 4, 2010 - 10 answers

Help me understand my hard-to-understand calculus shirt. [more inside]
posted by wanderingmind on Jul 5, 2010 - 9 answers

What equation can I use to calculate the number of miles in a degree of longitude for a given latitude? [more inside]
posted by Glendale on Aug 19, 2008 - 9 answers

I'm looking for some help with a math equation / algorithm I'm trying to create. I'm a programmer by trade and not very good at math so I'd like some help with this or perhaps a site where I could pay someone to come up with the equation I'm looking for. I considered rentacoder or elance however I'd be concerned if the companies there had the proper math knowledge. A lot of claims get made on those sites that turn out to be false. [more inside]
posted by JohnGL on Jul 3, 2008 - 6 answers

Help with a large, stupidly theoretical question involving sea rise, population growth, and human development... should be fun. [more inside]
posted by omnigut on Jun 12, 2008 - 17 answers

Is there a mathematical formula relating time and memory? [more inside]
posted by bru on Jan 31, 2006 - 16 answers