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Where do I start learning more about sound synthesis? [more inside]

posted by mkb on Jan 21, 2007 - 9 answers

posted by mkb on Jan 21, 2007 - 9 answers

100 multiplication problems in 5 minutes. Our 9yo needs help in speeding up his answers. [more inside]

posted by LadyBonita on Jan 19, 2007 - 63 answers

posted by LadyBonita on Jan 19, 2007 - 63 answers

This is probably a simple math question for someone who knows math.
Schools create an index number by using this equation:
(X * testscorenumber) + (Y * GPA) + constant = indexnumber
Some schools index numbers max out at 5, some at 200. Nonetheless, the difference between schools is in how they weight GPA vs. testscore.
What formula would allow me to compare the importance of once factor over another among schools. I.e., School A weighs testscores 2x more than school B? Is it a simple ration between X and Y?

posted by JakeWalker on Jan 16, 2007 - 12 answers

posted by JakeWalker on Jan 16, 2007 - 12 answers

How can I work out if a point x,y,z is contained by a cone ? [more inside]

posted by matholio on Jan 14, 2007 - 15 answers

posted by matholio on Jan 14, 2007 - 15 answers

I will be graduating with a B.A. in Math/C.S. in two years. What sort of job should I be looking for now? [more inside]

posted by philomathoholic on Jan 2, 2007 - 8 answers

posted by philomathoholic on Jan 2, 2007 - 8 answers

What is the Big O of the slowest algorithm in P [more inside]

posted by Osmanthus on Dec 30, 2006 - 46 answers

posted by Osmanthus on Dec 30, 2006 - 46 answers

A speeding driver just about rear-ended my delivery truck. I know how long her skidmarks are. Can I determine how fast she was driving? [more inside]

posted by jdroth on Dec 21, 2006 - 19 answers

posted by jdroth on Dec 21, 2006 - 19 answers

Mathematicians, I've always suspected there is a real opportunity to exploit the inefficiencies of the online sports betting markets and amateur bettors and make serious money. Have you felt the same way or am I kidding myself? [more inside]

posted by vizsla on Dec 17, 2006 - 7 answers

posted by vizsla on Dec 17, 2006 - 7 answers

I remember reading an anecdote about Feynman, written by Feynman either in Surely, You're Joking or What Do You Care What Other People Think. He was describing how in his undergraduate years people were really impressed by his ability to do integrals, all because he knew this integration technique that wasn't taught very often. What was that technique?

posted by phrontist on Dec 4, 2006 - 10 answers

posted by phrontist on Dec 4, 2006 - 10 answers

How do I nurture a 15-year-old's interest in mathematics? [more inside]

posted by neuron on Nov 29, 2006 - 34 answers

posted by neuron on Nov 29, 2006 - 34 answers

Help me draw interesting simple things. [more inside]

posted by ostranenie on Nov 22, 2006 - 16 answers

posted by ostranenie on Nov 22, 2006 - 16 answers

ProbabilityFilter: Calling all mathematicians... [more inside]

posted by 777 on Nov 21, 2006 - 26 answers

posted by 777 on Nov 21, 2006 - 26 answers

Science and math educators, K-12 and college! What are your favourite science and math sites that you use for planning lessons and curricula, or for classroom use? And why? Thanks! [more inside]

posted by carter on Nov 16, 2006 - 3 answers

posted by carter on Nov 16, 2006 - 3 answers

I am currently a graduate student who has been tutoring first year students in math at my university for the past 4 years. I've tutored probably over 140 students. I'd like to start doing prep sessions for exams and am looking for some advice. [more inside]

posted by jplank on Nov 10, 2006 - 1 answer

posted by jplank on Nov 10, 2006 - 1 answer

What is a good algorithm for generating smooth curves from discrete points? [more inside]

posted by ijoshua on Nov 9, 2006 - 8 answers

posted by ijoshua on Nov 9, 2006 - 8 answers

Mathematics Factoring Problem
**Factor completely:**
*16p^8w – 49p^6w*
The ^ represents an exponent.
I know this problem is a difference of two squares, it's the 8w and 6w that throw me off. I've tried several solutions but none check to be true.

posted by foreversport on Nov 6, 2006 - 16 answers

posted by foreversport on Nov 6, 2006 - 16 answers

How do I take the derivative of the gamma function, so I can prove that the derivative of the gamma function is the gamma function multiplied by the polygamma function? [more inside]

posted by Loto on Nov 5, 2006 - 4 answers

posted by Loto on Nov 5, 2006 - 4 answers

What is the next number in this sequence: 4, 58, 40, 27, 18, 12, 8, ? Please give your explanation. [more inside]

posted by scodger on Oct 29, 2006 - 41 answers

posted by scodger on Oct 29, 2006 - 41 answers

A math terminology question. What is meant by a "log-linear" relationship, and what distinguishes it from a plain logarithmic one?

posted by shoos on Oct 27, 2006 - 13 answers

posted by shoos on Oct 27, 2006 - 13 answers

Vector Geometry Filter: I'm working in matlab and need to transform a surface to match an arbitrary angle. I have the unit vector of the new normal (and the original normal is in the Z axis (0 0 1))...however i'm not sure how to rotate one normal to another (i know, i know, it sounds very simple really...) [more inside]

posted by NGnerd on Oct 23, 2006 - 5 answers

posted by NGnerd on Oct 23, 2006 - 5 answers

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

posted by Vorteks on Oct 20, 2006 - 10 answers

help me prove this is impossible:
package of goobers has 5 per package
package of marshmallows has 2 per package
package of gum has 1 per package
how can i have 9 packages totalling 13 treats?
i think its impossible. prove me wrong.

posted by fumbducker on Oct 16, 2006 - 21 answers

posted by fumbducker on Oct 16, 2006 - 21 answers

Online Degree Question: Has anyone actually completed a math degree online? If so, what school did you attend and how would you rate it? [more inside]

posted by fellion on Oct 16, 2006 - 6 answers

posted by fellion on Oct 16, 2006 - 6 answers

Is there a formula for converting cubic meters to tons?
I missed this lesson in math class way back when and now I need to do these conversions for a project at work.

posted by socrateaser on Oct 12, 2006 - 14 answers

posted by socrateaser on Oct 12, 2006 - 14 answers

I want to give my 4 year old a decent grounding in science, but I'm prety dim, myself. Where do I start? [more inside]

posted by maryh on Oct 4, 2006 - 23 answers

posted by maryh on Oct 4, 2006 - 23 answers

How do I calculate the mean of a frequency distribution on an HP 48SX calculator? [more inside]

posted by DakotaPaul on Sep 27, 2006 - 6 answers

posted by DakotaPaul on Sep 27, 2006 - 6 answers

I just discovered that my math professor is recycling homework assignments verbatim from prior years. I have a friend that took the course a couple years ago, and has all the answer keys. Is it ethical for me to use them? [more inside]

posted by jtfowl0 on Sep 25, 2006 - 90 answers

posted by jtfowl0 on Sep 25, 2006 - 90 answers

Could someone suggest book(s) that deal with tips/tricks/methods of performing mathematical calulations faster. I mean higher mathematics and not just elementary operations like addition/multiplication/finding the root etc.
What I am looking for are hints and shortcuts that would help me with stuff like calculus, linear albegra, vectors and such.
Thanks!

posted by sk381 on Sep 20, 2006 - 7 answers

posted by sk381 on Sep 20, 2006 - 7 answers

What is Multivariable Testing, really? It was mentioned in this NYTimes article, but the term is only ever used in relation to QualPro, Inc.. What is the real mathematical/statistical technique they're using? Is this related to the Taguchi Method? Can someone explain it to me?

posted by joshwa on Sep 19, 2006 - 5 answers

posted by joshwa on Sep 19, 2006 - 5 answers

It's official: my 11 year-old daughter is missing her math gene: Please suggest some math gene therapy. [more inside]

posted by sexymofo on Sep 11, 2006 - 26 answers

posted by sexymofo on Sep 11, 2006 - 26 answers

I would like to relearn some calculus on my own. Please recommend the best book for the purpose. [more inside]

posted by perissodactyl on Sep 10, 2006 - 16 answers

posted by perissodactyl on Sep 10, 2006 - 16 answers

I need a little help figuring out the odds of a baseball pool scenario actually occurring. (And correctly constructing this question, it looks like). [more inside]

posted by nevercalm on Sep 7, 2006 - 18 answers

posted by nevercalm on Sep 7, 2006 - 18 answers

I can visualize complex 3D objects in my mind, and give them arbitrary rotations. Why can't I do long multiplication in my head? [more inside]

posted by b1tr0t on Sep 1, 2006 - 21 answers

posted by b1tr0t on Sep 1, 2006 - 21 answers

MathFilter: Okay, I've got this gumball machine, which contains an infinite amount of gumballs, evenly distributed between 100 different flavors... [more inside]

posted by rifflesby on Sep 1, 2006 - 10 answers

posted by rifflesby on Sep 1, 2006 - 10 answers

If I have 3 or more locations on a map, how can I find the nearest point to all the locations? [more inside]

posted by hubs on Aug 29, 2006 - 14 answers

posted by hubs on Aug 29, 2006 - 14 answers

Is this the correct methodology for comparing rates of speed? [more inside]

posted by amethysts on Aug 26, 2006 - 9 answers

posted by amethysts on Aug 26, 2006 - 9 answers

Is there a way to put more than eight distinctive states in an 8-bit byte? [more inside]

posted by ostranenie on Aug 18, 2006 - 20 answers

posted by ostranenie on Aug 18, 2006 - 20 answers

A while back I was implementing a distributed transaction coordinator, and in the process also learned some of the pertaining theory. The only thing I can remember semi-vividly was a proof showing that you can't synchronize an action between two parties over an unreliable link, but I can't seem to find it any longer.
The final step of the proof was something like "thus, if this was possible, you could shorten every conceivable protocol by one step, which reduces all protocols to the zero-step protocol, which is impossible".
I'm pretty sure that it's a standard result of computer science, but I'm unable to find the right keywords to locate it. Help?

posted by themel on Aug 18, 2006 - 5 answers

posted by themel on Aug 18, 2006 - 5 answers

If i have a 20% probability of something happening each time its checked, and make two checks of said event triggering, what is the overall chance of it happening? [more inside]

posted by teishu on Aug 14, 2006 - 13 answers

posted by teishu on Aug 14, 2006 - 13 answers

An out-of-left-field question for the mathematicians regarding the possible link between pi and the number 6 in geometry. [more inside]

posted by Navelgazer on Aug 14, 2006 - 22 answers

posted by Navelgazer on Aug 14, 2006 - 22 answers

I need more examples of "interesting" calculus (or other mathy) trivia like this one factoid I mention in here... [more inside]

posted by evinrude on Aug 10, 2006 - 21 answers

posted by evinrude on Aug 10, 2006 - 21 answers

My maths skills are rubbish. Help me understand modulus remainders [more inside]

posted by TheDonF on Aug 8, 2006 - 10 answers

posted by TheDonF on Aug 8, 2006 - 10 answers

Mrs. Everichon is convinced that there is a law or principle (as in "Foo's Law") which describes the phenomenon wherein a pond can take weeks to become 50% covered in algae, but then the remaining 50% takes only a day. [more inside]

posted by everichon on Jul 25, 2006 - 9 answers

posted by everichon on Jul 25, 2006 - 9 answers

Can someone explain coinduction (mathematics, computer science) in English? [more inside]

posted by knave on Jul 24, 2006 - 7 answers

posted by knave on Jul 24, 2006 - 7 answers

My sweet son has many disabilities--type 1 diabetes, ADHD, depression. At 15, he just confessed with great pain that he doesn't know his multiplication tables very well. Explains a lot.
Any really wonderful suggestions that don't infantilize and humiliate him. Ones that work? Any personal success stories and moral support will make me heart you.

posted by wordswinker on Jul 21, 2006 - 52 answers

posted by wordswinker on Jul 21, 2006 - 52 answers

Why do children in the United States perform so poorly in math? [more inside]

posted by LoriFLA on Jul 15, 2006 - 78 answers

posted by LoriFLA on Jul 15, 2006 - 78 answers