## Volunteered to add up the votes for my Book Club; No idea how to do it

This year my Book Club decided to vote on the books we'll read all at once instead of month-by-month. There are 17 books choose from in total and I gave each person a sheet with the books in alpha order. I then asked them to order the books by preference – i.e., their first choice is #1, their second #2 etc.
posted by Lescha on Jan 18, 2016 - 6 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.
posted by moira on May 10, 2014 - 6 answers

## How do i determine the wall thickness of a Cylinder if it gets expanded.

I would like to use a mathematical formula in Excel to try and determine how much the wall thickness of a Cylinder or tube changes if it is expanded.
posted by ndillon on Feb 27, 2014 - 11 answers

## Math/Physics Question: Stability of an abruptly stopped object

If you have an object with a given base length and a given CG height, how fast can it travel before you have to worry about it running over an obstacle and falling over?
posted by Popular Ethics on Mar 5, 2013 - 16 answers

## Can someone explain how IRA early withdrawal penalties are calculated?

Everywhere mentions a 10% penalty, but nobody says whether this is pre or post tax, or whether it's added to your existing tax burden, or how these taxes actually get paid, etc.
posted by tylerkaraszewski on Jan 24, 2013 - 7 answers

## Perspective drawing calculation

If I want to draw something in one-point perspective, say, like a set of railroad tracks where the vanishing point is on the horizon, and the tracks are represented on the picture plane by an equilateral triangle (they appear that way to the viewer), the apex of the triangle being the vanishing point on the horizon and the base of the triangle is where the tracks meet the picture plane, how do I calculate where the railroad ties would be? (Given that in 3D they are evenly spaced. Also, I'm not really concerned with the thickness of the ties -- we can consider the ties to simply be horizontal lines.)
posted by strangeguitars on Jan 8, 2013 - 5 answers

## Help me improve the ASA fitness classification system

The ASA physical status classification system is used by anaesthesiologists, surgeons and epidemiologists the world over. It has a major flaw - it makes no odds whether index patients have 1 or 5 systemic diseases: only the leading/worst is counted. This has the advantage of simplicity but is potentially misleading and should be done better in the 21st century. Numbercrunchers with a biomedical background needed ...
posted by kairab on Nov 9, 2012 - 4 answers

## Math Geeks!! Assistance needed!!

How should a surcharge be calculated?
posted by elf27 on Jun 7, 2012 - 11 answers

## Calculate Electric Cost

How much does my refrigerator cost to run per month? The info tag on the inside reads; 110-127 VAC, 60 HZ, 11.2 AMPS. It runs 24/7 and my NYC electric is charged at .1999 per KWH. Including the calculation in your answer would be appreciated. Thanks.
posted by mbx on Nov 13, 2011 - 15 answers

## What would the check-digit be on this string: K1506235620?

What would the check-digit be on this string: K1506235620?
posted by JPigford on Sep 12, 2011 - 6 answers

## Tell me I'm not cheap!

Do you calculate your waiter's tip based on the pre-tax or the with-tax total?
posted by just_ducky on Dec 5, 2010 - 76 answers

## Shipping charges

Online payment system with integrated shipping charges calculator?
posted by yoyo_nyc on Nov 2, 2010 - 3 answers

## What do you call similarity calculation?

what do you call the science/math for calculating similarity between people based on survey results (like OK Cupid)?
posted by lrivers on Sep 14, 2010 - 12 answers

mySQL query question about calculating percentages in a table.
posted by omnipotentq on Sep 5, 2010 - 3 answers

## Figuring interest at a per-month rate, compounded monthly

Mathfilter: How do I figure the total value of interest at a per-month rate, compounded monthly, with monthly contributions?
posted by AV on Jun 9, 2010 - 17 answers

## Birth year confusion

Can I conclusively determine a birth year from these two data points?
posted by activitystory on Apr 5, 2010 - 3 answers

## What is a Fair Interest Rate for Money Loved Ones Lent You With No Interest Rate Specified?

Despite the lender explicitly loaning me something interest-free and with no firm repayment date, I would like to offer a fair interest rate when I am able to repay them in the future. I'd like your help in figuring out what that rate would be, and your confirmation that I am applying the concept of compound interest correctly.
posted by anonymous on Feb 25, 2010 - 14 answers

## "I'll Calcu Later!"

I've seen people compute complex arithmetic off the top of their head. How do they do it?
posted by Christ, what an asshole on Apr 30, 2009 - 13 answers

## Math question

Math problem with shipping rates. Can a maths whiz point me in the right direction?
posted by dydecker on Apr 14, 2009 - 11 answers

## Need an instant quote web form that instantly calculates quotes!

Does anyone know of a php script that can be used to easily generate a web form, and that can have a "calculation" box at the bottom, that will calculate a cost based on the previous response fields?
posted by thewibbler on Apr 1, 2009 - 6 answers

## Yet another excel question!

I have an Excel question that I'm not sure how to search the archives for.
posted by pdb on Nov 4, 2008 - 4 answers

## What equation should I use to calculate the number of miles in a degree of longitude for a given latitude?

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

## creating circles from rectangles

Math filter: How many equally sized rectangles will fit into a circle, and how should I arrange them in order to make the best-looking approximation?
posted by brandnew on Aug 17, 2008 - 9 answers

## Old Car: How to decide on repair vs. replace?

I drive a 1992 Toyota Camry with just over 203,000 miles on it. As far as I know, the car is in good mechanical condition except that the rear struts are in fairly desperate need of replacement. How do you calculate the payback period for repairing an old but paid-off car, and how might you use this information to help decide whether to repair the car or buy a newer used car?
posted by Juffo-Wup on Jul 18, 2008 - 20 answers

## Using a Database for analysis of temperatures

I've got an interesting question about MS Acess. It involves using lat/long data... Anyone care to help?
posted by dance on Nov 2, 2006 - 15 answers

## How do I calculate GPP on goods sold?

How do I calculate Gross Profit Percentage (GPP) on goods I sell?
posted by tomble on Sep 9, 2006 - 2 answers

## Excel master needed...where to find one?

I run a computer service. I have an issue that is a bit outside the bounds. I have a client who has been using an Excel spreadsheet to track his portfolio. It is pre-formatted for him to enter data and the formulas are all there. Just recently, it started calculating some things incorrectly. The person who originally set it up just passed away earlier this year. We need an Excel expert that can look at the file and don't know where to begin to find one. Checked the local community college but no dice. All ideas or pointers are appreciated.
posted by titans13 on Aug 17, 2006 - 11 answers

## drill press force multiplier?

Power Tool Filter: Is there some kind of 'force multiplier' in effect when using a drill press? i.e. when you put two pounds of pressure on the handle, is there more pressure applied to the work surface? Perhaps most importantly, how hard would this be to calculate?
posted by schwap23 on Jul 18, 2006 - 6 answers

## How can the energy cost of an electronic device over a span of time be calculated?

How can the energy cost of an electronic device over a span of time be calculated?
posted by airguitar on Feb 21, 2006 - 6 answers

## Calculate ambient light level?

How can I calculate the ambient (natural) light level for a particular location and time?
posted by orthogonality on Nov 22, 2005 - 9 answers

## calories and acting

Myth or truth?: You burn as many calories playing a major theatrical role (i.e. "Hamlet") as you do running a marathon. And how DO you calculate calories, anyway?
posted by grumblebee on Jul 8, 2005 - 20 answers

## How does my pocket calculator do this?

How does my pocket calculator do this?
posted by Termite on Mar 28, 2004 - 6 answers

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