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SocratesAvailable

I can answer any questions from the standard four semester Calulus sequence. Derivatives, partial derivatives, chain rule, single and multiple integrals, change of variable, sequences and series, vector integration (Green`s Theorem, Stokes, and Gauss) and applications. PreCalculus, Linear Algebra and Finite Math questions are also welcome.  
randy pattonU.S.
Available

college mathematics, applied math, advanced calculus, complex analysis, linear and abstract algebra, probability theory, signal processing, undergraduate physics, physical oceanography  
Clyde OliverU.S.
Available

I can answer all questions up to, and including, graduate level mathematics. I am more likely to prefer questions beyond the level of calculus. I can answer any questions, from basic elementary number theory like how to prove the first three digits of powers of 2 repeat (they do, with period 100, starting at 8), all the way to advanced mathematics like proving Egorov's theorem or finding phase transitions in random networks.  
Sombra ShadowU.S.
Available

I can answer most questions up through Calculus and some in Number Theory and Abstract Algebra.  
Ahmed SalamiNigeria
Available

I can provide good answers to questions dealing in almost all of mathematics especially from A`Level downwards. I can as well help a good deal in Physics with most emphasis directed towards mechanics.  
Scott A WilsonU.S.
On Vacation
returns 09/01/2014 
I can answer any question in general math, arithetic, discret math, algebra, box problems, geometry, filling a tank with water, trigonometry, precalculus, linear algebra, complex mathematics, probability, statistics, and most of anything else that relates to math. I can also say that I broke 5 minutes for a mile, which is over 12 mph, but is that relevant?  
Janet YangU.S.
On Vacation
returns 09/01/2014 
I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth. 
The way I figure it is that the filter press is able to squeeze out enough water to produce a 20% solid component flow (cake) from a 3% flow (sludge). This assumes that the press captures all the waste
"A man has a barrel which is full of vinegar." The barrel contains v gallons of vinegar. "He removes 4 gallons and refills the barrel with water." The barrel contains 4 gallons of water and (v4)
The symbol j in my answer is an index, so that the expression ∑(j=1,N+1)･j = ∑(j=1,8)･j = 1+2+...+7+8 = 36 can be interpreted as "the sum as j goes from 1 to N+1 of j".
Interesting question! When I first looked at it, I thought the solution would immediately use some standard statistics/combinatorics formula, but it a little more tricky. The general solution involves
If you use the definition of a factorial as a gamma function, then noninteger real and complex numbers can be represented. Note that the factorial n! arises from integrating the gamma function by parts
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