Monthly Archives: August 2014

CNN Hong Kong in Brazil Redux; maybe it was too bad to be true.

Remember this?                 Well, it looks like my prior post “Don’t Know Much About Geography” was maybe too bad to be true.  The Drudge Report today has a ink to a Variety story … Continue reading

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More on the Weekend Earthquakes

Zero Hedge estimates that the earthquake in the San Francisco area this weekend will cost…” as high as $4 Billion dollars.”  This was in an article Zero Hedge posted today on the weekend earthquakes.  It also  featured  a Bloomberg video on … Continue reading

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Much Simpler Matrix Operations. Addition, Subtraction, and Scalar Multiplication.

Multiplying a matrix by a scalar (a single number) is a much simpler matter than multiplying a matrix by a matrix.  In the example below you just multiply each number in the matrix times 3:           … Continue reading

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6.1+ Weekend Earthquakes in the Bay Area and Chile — Updated: Peru too.

 Updated:  I discovered after I finished this post that there was another big earthquake today August 24, 2014.  This time it was 6.9 and in a remote area of Peru.  See below at the bottom of the post for more … Continue reading

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Determinants – The 3×3 Matrix.

Once again, we’ll take a problem from Kelley’s Algebra pg. 122-123, Problem 6.  This is a 3 x 3 Matrix, still a square matrix but the calculation of the determinants is not as straight forward as the 2 x 2 Matrix.  Both … Continue reading

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Determinants – How to Calculate the Determinants for a 2×2 Matrix

In order to calculate the determinant for a matrix, it must be a square matrix, with equal rows and columns.  The easiest square matrix to find the determinant is one that is 2×2.   See Kelley’s Algebra pg. 121-122.  Below, … Continue reading

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Determinants in Matrix Algebra: Why are they important?

I had a difficult time making sense of this topic.  Good mathematicians frequently have trouble teaching math—I’m guessing—because they have mastered the art of thinking in numbers but are unable to translate that into English.  Or perhaps—I’m also guessing—a subject … Continue reading

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A Triple Whammy for Waimea, Hawaii … Update: Well, maybe not.

Good news for the Hawaiian Islands.  The would be hurricanes   Iselle fizzled and Julio is on a course north of the Islands all together.  Only high surf, some wind damage, and some downed power lines.           … Continue reading

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Don’t know much about geography…..

How could anyone working for a major news organization make a mistake like this:                 Well,  Hong Kong is not in Brazil or anywhere else in South America.   Perhaps this old song … Continue reading

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Magnitude 6.1 Earthquake near Wenping China

I’m a couple of days late on this but on Sunday, August, 3, 2014, a Magnitude 6.1 Earthquake struck 11 Kilometers West North West of Wenping China.  According to Earthsky.org, the Associated Press is reporting 398 deaths, 1800 injuries, and … Continue reading

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