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Expertise

Hello, I am a college professor of mathematics and regularly teach all levels from elementary mathematics through differential equations, and would be happy to assist anyone with such questions!

Experience in the area

Over 15 years teaching at the college level.

Education/Credentials

B.S. in Mathematics from Rensselaer Polytechnic Institute
M.S. (and A.B.D.) in Applied Mathematics from SUNY @ Stony Brook

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
UserDateKCPComments
K.F.04/15/17101010Thanks for the follow-up reply!
K.F.04/14/17101010Thanks for the reply!
Debbie06/01/16101010 
Gabe04/12/16101010Thank you! Very detailed, much appreciated.
Jeffrey04/06/16101010Great example, even the knuckleheads I work .....

Recent Answers from Abe Mantell

2017-01-30 The number pi:

Hello Tom,    These days, with the Internet, it is easy to get many digits of pi with great reliability.  For example:  http://www.factmonster.com/ipka/A0876705.html  http://www.geom.uiuc.edu/~huberty/math5337/groupe/digits

2017-01-16 mental math:

Good question!    Here are some places to read about it...  https://www.quora.com/How-did-Shakuntala-Devi-perform-such-huge-calculations-with-great-speed-and-precision  https://www.quora.com/How-did-Shakuntala-Devi-mentally-calculate-the-23rd-root-of-a-201-digit-number-correctly

2017-01-07 Determing actual age from apparent age of characters:

Hello Julian,    Without additional info there are literally infinitely many possibilities!  The relationship could be (1) linear, (2) quadratic, (3) cubic, (4) exponential, (5) logarithmic,  (6) power

2016-06-06 help:

Hello Aishwarya,    These websites should help:  http://www.whoinvented.org/who-invented-numbers/  https://en.wikipedia.org/wiki/Number  http://www.whoinventedit.net/who-invented-numbers.html  http://mathforum

2016-05-23 How to combine two percentage (which may have overlap):

Hello Ahmad,    In this case we can use the well-known formula in probability: P(A or B) = P(A) + P(B) - P(A and B)    However, we only know P(A)=0.5 and P(B)=0.6, we need one more piece of info...either

 

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