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tkhunny
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tkhunny
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Join Date
04-12-2005
Last Activity
Yesterday
10:01 PM
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Yesterday,
04:09 PM
tkhunny
replied to a thread
Prove
in
Calculus
In today's age, one could simply add them all up. 0.307... < 0.375 Perhaps regroup? 1/2 - 1/12 - 1/30 - 1/56 - ... etc. Will those terms be...
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1 replies | 69 view(s)
Yesterday,
03:52 PM
tkhunny
replied to a thread
Help me to prove this Trigonometric problem
in
Geometry and Trig
What have you tried? First thing that came to my mind: 3 = 1+2 and 5 = 1+4
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2 replies | 68 view(s)
01-16-2019,
05:43 PM
tkhunny
replied to a thread
How many combinations of sets of 6?
in
Arithmetic
You've been given an example and a place to work out the problem in its entirety. "I am BAD at math..." Who told you that and why did you believe...
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8 replies | 303 view(s)
01-15-2019,
04:29 PM
tkhunny
replied to a thread
This question makes zero sense
in
Geometry and Trig
And do NOT trust your eyes. It's NOT to scale. Use the given values.
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15 replies | 500 view(s)
01-15-2019,
04:26 PM
tkhunny
replied to a thread
trig equation solution help
in
Geometry and Trig
Why the "?"? Look for errors. If you find none, smile and move on to the next problem. This builds confidence. Don't be in a rush to EXPAND or...
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6 replies | 300 view(s)
01-15-2019,
12:40 PM
tkhunny
replied to a thread
Why does not match?
in
Calculus
I'm just super unhappy with this question. Why would I substitute x = 0 into the expression for the derivative that I know is not defined for x =...
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9 replies | 358 view(s)
01-15-2019,
11:07 AM
tkhunny
replied to a thread
how to simplify 784^2/3
in
Pre-Algebra
I never have understood the concept of counting steps. Are there any perfect cubes in 2^{4}\cdot 7^{2}
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4 replies | 253 view(s)
01-15-2019,
11:02 AM
tkhunny
replied to a thread
trig equation solution help
in
Geometry and Trig
You were SO CLOSE! \dfrac{2+2\cos(x)}{\sin(x)+\sin(x)\cos(x)} = \dfrac{2\cdot(1+\cos(x))}{\sin(x)\cdot(1+\cos(x))} -- Now what?
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6 replies | 300 view(s)
01-14-2019,
10:32 PM
tkhunny
replied to a thread
I don't really get this question at all
in
Geometry and Trig
I won't ask for your work, but I must demand at least the drawing. I do not believe you do not know where to start. Lateral surface area of a...
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9 replies | 344 view(s)
01-14-2019,
04:59 PM
tkhunny
replied to a thread
Negative roots when simplifying surds
in
Pre-Algebra
"problem includes ... no plus or minus" - Not a fan. What is \sqrt{4}? It is 2 I do not ever recall seeing such a simplification problem as:...
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20 replies | 590 view(s)
01-14-2019,
11:40 AM
tkhunny
replied to a thread
Why does not match?
in
Calculus
What expression did you manage for part a? Why would they be the same? What sort of singularity have we at x = 0?
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9 replies | 358 view(s)
01-10-2019,
09:51 PM
tkhunny
replied to a thread
improper integral with paramater
in
Calculus
I'm tempted to start with ln(1/x) = -ln(x).
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1 replies | 266 view(s)
01-09-2019,
10:07 PM
tkhunny
replied to a thread
what is happening here?
in
Intermediate/Advanced Algebra
Please learn to experiment with simpler examples. Maybe... 4 + 3 = 7 16 + 9 \ne 49 -- Something went wrong.
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32 replies | 707 view(s)
01-09-2019,
11:40 AM
tkhunny
replied to a thread
Choice of 4, 100 times. How often do you pick right the 1st, 2nd, 3rd and 4th times?
in
Probability / Statistics
1) "Odds" and "Probabilities" are NOT the same thing. Please don't use them interchangeably. 2) Assuming you can answer HoI's question in the...
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3 replies | 115 view(s)
01-09-2019,
11:27 AM
tkhunny
replied to a thread
How to calculate the mean for unknown figures
in
Probability / Statistics
Depends on your opinion or needs Will you treat the "No Response" as 1) Having the same proportions as the responsive population, or 2) A...
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2 replies | 128 view(s)
01-08-2019,
06:06 PM
tkhunny
replied to a thread
Standard deviation query
in
Probability / Statistics
Sample size 20... Is there a square root in your denominator future?
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2 replies | 102 view(s)
01-08-2019,
06:04 PM
tkhunny
replied to a thread
Expectation of standardised random variable
in
Probability / Statistics
U^{2} = \left(\dfrac{X - E}{\sigma_{X}}\right)^{2} --Can you prove it?
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2 replies | 98 view(s)
01-05-2019,
12:30 PM
tkhunny
replied to a thread
bonds in subtraction operation - or problem of reading
in
Arithmetic
I think the answer is in the example: 9 + 7 = 16; 16 – 7 = 9; 7 = 16 – 9 The "Number Bond" seems to suggest that there is some sort of "bond"...
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2 replies | 169 view(s)
01-04-2019,
07:50 PM
tkhunny
replied to a thread
PARABOLA equation: Stuck and need help please :-)
in
Calculus
Try 24^{2}
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2 replies | 151 view(s)
01-03-2019,
10:22 PM
tkhunny
replied to a thread
Is 19 greater than 800? (Serious Question)
in
Arithmetic
19 800 Simple. But it did say "numerically".
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8 replies | 343 view(s)
01-03-2019,
09:04 PM
tkhunny
replied to a thread
Is 19 greater than 800? (Serious Question)
in
Arithmetic
Are you SURE it's not a clown question? Take a knife to a number line. Cut it somewhere in between 19 and 20. EVERYTHING on the 20-side is...
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8 replies | 343 view(s)
01-03-2019,
06:17 PM
tkhunny
replied to a thread
Geometric series determine the first 3 terms
in
Intermediate/Advanced Algebra
Excellent question. Didn't think of that.
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7 replies | 306 view(s)
01-03-2019,
06:15 PM
tkhunny
replied to a thread
name for numbers can't be resolved in equations?
in
Math Odds & Ends
It is an ambiguous question. In the world of programming, most any variable or parameter so referenced, can be a constant, a vector, an...
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1 replies | 27 view(s)
01-03-2019,
06:08 PM
tkhunny
replied to a thread
Geometric series determine the first 3 terms
in
Intermediate/Advanced Algebra
Hint: S4 = S0 * r^4 = 3 * r^4 Note: I'm assuming S0 is the first term and S1 is the second term. That makes S4 the fifth term.
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7 replies | 306 view(s)
01-03-2019,
01:59 PM
tkhunny
replied to a thread
Expected value from triangle distribution
in
Probability / Statistics
haha This is how we learn.
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6 replies | 321 view(s)
01-03-2019,
01:58 PM
tkhunny
replied to a thread
Using normal distribution
in
Probability / Statistics
There a vast difference between simply "guessing" and knowing where to guess. You seem to be in the latter method. This is good.
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7 replies | 360 view(s)
01-02-2019,
08:06 PM
tkhunny
replied to a thread
Using normal distribution
in
Probability / Statistics
This illustrates one way you can check your work. You can find 68.2 by adding the four pieces, like you just demonstrated, or you can add up all the...
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7 replies | 360 view(s)
01-02-2019,
08:05 PM
tkhunny
replied to a thread
Expected value from triangle distribution
in
Probability / Statistics
Gaining confidence is part of what you should be doing. Good work. I was going to ask how you computed the intercept. If you said you found the...
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6 replies | 321 view(s)
01-02-2019,
05:38 PM
tkhunny
replied to a thread
Using normal distribution
in
Probability / Statistics
1) How did you get 68.4% 2) Estimation Exercise: There are about half as many "special", so you'll need about twice the price. This should make...
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7 replies | 360 view(s)
01-02-2019,
05:33 PM
tkhunny
replied to a thread
Expected value from triangle distribution
in
Probability / Statistics
Except for the "I got 2/15", it is fine. Why do you doubt? Does that seem reasonable? One for free. Next time, actually show your work.
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6 replies | 321 view(s)
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About tkhunny
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About tkhunny
Location:
USA
Occupation:
Actuary
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"Unique Answers Don't Care How You Find Them." - Many may have said it, but I hear it most from me.
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