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898 posts tagged with math.

Displaying 251 through 300 of 898. Subscribe:

## Why should "e" exist?

Why is the number "e" so... [more inside]

## Help me understand a little logic problem.

Help me understand this. Math/logic puzzle follows... [more inside]

## Too much noise in my data

Putting on the math signal: calling the statistics-literate. Trying to change my weight/body composition and track progress in a useful way, but I'm having trouble separating normal daily variation from actual real change. [more inside]

## Help her learn Alg II by Tuesday

Sister just learned she has to take an Algebra II test on Tuesday that covers the whole shebang. She's forgotten (repressed?) most of it. What's her best bet for an Algebra II crash course that will go over all the topics? She's very smart, but not a math person.

## Looking for a new or different High School math test generator, and Apple programs or apps for use in the classroom

I'm looking for software for a high school math teacher: first, a better/newer test generator, and second, in-classroom programs, bonus points for apps for an Apple laptop and/or an iPod touch. Details inside. [more inside]

## x + y = A in pre-calc. Help me solve for x and y!

What do I need to know to be ready for pre-calculus? [more inside]

## The Iceman Wondereth

How much is an ice cube from my fridge worth? [more inside]

## How does science education work?

What's important for me to know about being a science teacher, since I've only taught math but will now be training teachers of both contents? [more inside]

## "Why am I supposed to divide here?"

I need books that are good at explaining how to explain things to children. [more inside]

## My Trig Teachers Name Was Mr. Angle But That Didn't Make Him A Good Teacher.

My math skills are no where near where I'd like them to be. Can you recommend a self-paced math learning site? Pretty much any branch of math can apply. [more inside]

## Math is Hard (I need help)

Math is hard. Please help me with a slope-related problem. [more inside]

## Recommend a programmer a book that teaches high school maths step by step

Can you recommend a programmer a book that teaches high school maths step by step? I did maths at high scool and I was OK at it. However, fifteen years later, after forgetting almost all the maths I learnt back then, I am diving deep into the theory of programming algorithms (sorting, tree structures, graph algorithms and so forth). I find the programming straight forward, but I am struggling with the theory and proof of algorithmic time and space complexities. I am looking for a book that will cover algebra, logs, limits, inductive proof, matrix manipulation and so forth. [more inside]

## Mathless Engineer, Need Help!

How can I learn calculus and differential equations well, in a relatively short amount of time? [more inside]

## List places to teach/instruct/adjunct undergrad Math in Seattle?

List places to teach/instruct/adjunct undergrad Math in Seattle? [more inside]

## The Limits of Flatness

Are there an infinite number of 2D shapes? [more inside]

## Mac friendly computer software to draw math pictures.

Anyone know of a Mac friendly computer program that makes it easy to draw geometric figures? Preferably free, but I'm willing to pay if its not too much and if its worth it. [more inside]

## Operations in the Klasies Caves

I was helping my 4th grade age sister-in-law with her math homework, and came across a question that I couldn't figure out. Can you do it? [more inside]

## Math of Astrology

Could you recommend a book or web site on the math of astrology? [more inside]

## Getting my math(s) right.

Maths (math) people of the US: I need your help in working out if certain British conventions would be understood or standard in the US classroom. [more inside]

## Physical Mathematics?

Is there a book that teaches math via physics? [more inside]

## Best network/graph theory software for non-techies?

I'm teaching a minicourse about networks, graphs, and computation to a non-technical audience (mostly grad students in the humanities.) What's the right software platform? [more inside]

## Pocket Anthropology

Is there a way to find out approximately when I left this wad of money in my (very old) jacket pocket, using statistics and date/number info from the bills? What would be the minimum number of bills needed for such a thing?

## It's a piece of cake to bake a pretty cake

How do I score my fantasy cake contest in the most fair manner? [more inside]

## Exit strategy, please

I'm a math PhD student with two years left. I'm not sure I want a job in academia (but maybe I do). What should I be doing to maximise chances of success (whatever that means)? [more inside]

## Why can the reals be well-ordered but not countable?

Math-Filter - Set theory edition:
I am struggling with the difference between countable infinite sets and well-ordering. Longer explanation inside. [more inside]

## An odd property of Eigenvectors

The first eigenvector is related to the sum of the columns of a matrix. What is this property called? [more inside]

## Math Geeks!! Assistance needed!!

How should a surcharge be calculated? [more inside]

## How to Find The Average Commenter?

Harmonic or Arithmetic Mean?: I'm trying to settle an argument with my wife - is using the arithmetic mean or harmonic mean more appropriate when finding the "average" number of, say, online comments made by a large number of people, where a significant portion of them make only one comment and a few people make the bulk of the comments? [more inside]

## Making the impossible possible

Help with a simultaneously math & non-math question: Finding the square root of a negative number was impossible until imaginary numbers came along. What are examples of other things that were impossible until we altered systems that have been created? [more inside]

## Need formula for APR with long/short odd days.

Need formula for APR with long/short odd days. [more inside]

## Math Help - Library Contest Edition

Math Help! We're doing a big inventory project in my library this summer and we want to attach weekly prizes to it to help motivate the poor students who have to do all the scanning. Trick is, students do not work the same amount of hours per week, so we would like some way of weighting each student's output so that those that work less feel like they can compete with those who work more while not disadvantaging those with longer hours by requiring them to go insane in order to keep up. How to keep things fair and sane? [more inside]

## How to model the accident rate on a certain stretch of road

How could I approach modeling the number of accidents on a certain stretch of road? I've got some semi-ecological approaches in mind but no idea if they're workable. Are there standard approaches to this sort of problem? [more inside]

## I want to drink and derive in the comfort of my own home.

Good online accredited Precalculus and Calculus classes? [more inside]

## Prorating monthly fees

What is the right way to calculate daily rate for monthly charges? [more inside]

## Pageviews vs Visitors: Do people really just sit there and reload all day?

On the Lifehacker/Gawker websites, what do the views/viewer numbers really mean? How can articles with 100,000 pageviews only have 10,000 visitors? [more inside]

## Identifying urban centers using an algorithm based on topological prominence

Calling geographers: has anyone applied the idea of topological prominence to population density? [more inside]

## Google, why do you make my brain hurt?

How does real time google analytics measure the "active visitors on site"? Please help me, because apparently I fail at math. [more inside]

## .....wat?

I'd really love a detailed explanation of the terms and humor in this math / science related XKCD cartoon. [more inside]

## Is it possible to solve for X?

## Are the odds (ever) in my favor in this raffle?

Are the odds in this raffle significantly better than last year? [more inside]

## How to get 2nd Bachelor's Degree from UCLA after foreign-based Bachelor's?

Seeking 2nd Bachelor's degree in Applied Mathematics from UCLA, then PhD.
Details below. [more inside]

## Me + Math Major = Success?

Do you have to be "inherently" good at math to successfully major in math as an undergrad? [more inside]

## Bathrooms and Statistics

My workplace has 3 small bathrooms. It seems to me that if I go to use one of them, and it's occupied, there is a statically higher chance the 2nd and even 3rd bathroom will be occupied (vs the chance that they would be occupied if the 1st one was not). Is it true? [more inside]

## Let's do some math

A is the top of a vertical line 30 feet in length. B is at the base of that line. C is 63 feet from B in a horizontal right angle. What is the distance from A to C. [more inside]

## Help me find a specific Children's TV show.

Tracking down a pre-2000 children's TV show with a female presenter in a fairy tale style magician's house. [more inside]

## How many people lived in the U.S. between 1974 and 2004?

[MathFilter] How many people were alive in the U.S. between 1974 and 2004? [more inside]

## Help me make planet dice.

Is there an easy way to map a sphere onto a dodecahedron? I'm playing with the idea of generating "planet dice." [more inside]

## Pi R Square, but this is a circle

Please help me with some basic math: The circumference of a circle is 8 inches. Extend that circle by 8 inches from circumference (i.e. adding 16 inches to the diameter). Now what is the circumference of the larger circle? [more inside]

## Can you solve a time dilation math problem?

I'm writing a story and it has to do with time dilation and I don't want it to be one of those stories where people roll their eyes and say, "Well... It's just a story." I want accurate math. I suck at math. [more inside]

## Linear Algebra was easy, but I can't add 1+1 without using my fingers. WHAT.

Basically, what it says. I've been brushing up on my math skills via Khan Academy, and I'm running into a problem I hit when I was in school. Basically, the math *concepts*, like Algebra, Trig, and the like? I'm able to get really easily. But, manipulating the numbers and doing the basic arithmetic? Hard. Sometimes even with a calculator, I'll miss carrying over a negative sign, and I'll get the problem wrong, despite knowing the concepts really, really well. What's going on here? Is my ADHD not under control? Are these symptoms of Dyscalculia? What? Ideas, hivemind! [more inside]