523 reputation
313
bio website cobaltduck.info
location Milford, OH
age 42
visits member for 4 years
seen 11 hours ago

A former math teacher for 10 years, converted to Software Engineering just a few years ago. Enjoy woodworking, kayaking, hiking, and geocaching.


Sep
24
awarded  Nice Question
Sep
23
comment How to answer a student objection to the use of “of” in pronouncing f(x)?
Andre: Perhaps this is why I no longer teach algebra, and am now a computer programmer! Greg: "When I make a word do a lot of work like that," said Humpty Dumpty, "I always pay it extra."
Sep
23
asked How to answer a student objection to the use of “of” in pronouncing f(x)?
Aug
23
awarded  Organizer
Aug
23
revised How to determine where the function is continuous and where the function is differentiable with a piecewise function
removing the diff-eq tag
Aug
23
suggested suggested edit on How to determine where the function is continuous and where the function is differentiable with a piecewise function
Aug
23
comment How to determine where the function is continuous and where the function is differentiable with a piecewise function
Hint: Is it already clear to you that the function is continuous and differentiable everywhere except possibly 0 and 3, and you simply need to find which properties it fulfills at 0 and 3?
Aug
3
awarded  Yearling
Jul
20
comment probability that point is within triangle formed by three lines of bearing
@Christian. Take a compass. Look over it at a landmark. Note the direction of the landmark. This is a reading. Take out your nautical chart and draw a line from the landmark at the reciprocal (i.e 180 degrees) direction. This is the line of bearing.
Jul
14
awarded  Popular Question
Jun
23
answered Prime factorization of 1
Dec
1
comment Temporal aberration. Shape of telescope mirror large enough that light transit time is significant
If I could clarify, you are seeking a shape such that if two photons strike the mirror at different points but at the same time, then they will arrive at the focus at the same time. Is that correct?
Oct
7
answered Minimizing Gender Regularity in a linear arrangement of boys and girls
Sep
27
comment Solve cryptogram - ciphertext given
I'm not sure what the solution is, but perhaps if the problem were re-worded: There is a phrase that contains 4 words and 22 total letters (not counting the three spaces between the words). One letter appears four times, no letter appears three times, three letters appear twice, and 12 letters appear once each. What is this phrase?
Sep
27
comment Find thickness of a coin
"even with a really thick coin it's easier to tilt it when it lands on the edge than when it lands on a face." I have to disagree, consider the case of thickness >> face area, i.e. a dowel rod shape. Here, P(heads) ~= 0, P(edge) ~= 1
Sep
27
awarded  Scholar
Sep
27
accepted Aunt and Uncle's fuel oil tank dip stick problem
Sep
16
awarded  Self-Learner
Sep
11
awarded  Nice Question
Sep
7
revised Aunt and Uncle's fuel oil tank dip stick problem
fixed one formula