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karush
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Today,
21:33
MarkFL
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
The region $R$ is a rectangle having the vertices: (0,1),\,(1,1),\,(1,1),\,(0,1) One way we can compute the volume is: ...
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4 replies  53 view(s)
Today,
19:41
MarkFL
replied to a thread
logs
in
PreAlgebra and Algebra
Okay, we are given: \ln\left(x\frac{1}{x}3\right)=2 Converting from logarithmic to exponential form, we have: x\frac{1}{x}3=e^2 ...
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1 replies  15 view(s)
Today,
16:03
karush
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
Is the next step $$\int_0^1 \int_{1}^1 5(x^5y^5)^2 dx \, dy$$
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4 replies  53 view(s)
Today,
15:47
karush
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
$\tiny 15.1.25$ $\textsf{Evaluate the following double integral over the region R}\\$ \begin{align*}\displaystyle &\iint\limits_{R}5(x^5  y^5)^2...
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4 replies  53 view(s)
Today,
15:26
MarkFL
replied to a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
As for the $\LaTeX$, look under the "Calculus/Analysis" section of our Quick $\LaTeX$ tool. You will find it, which gives the code: ...
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4 replies  53 view(s)
Today,
15:12
karush
started a thread
15.1.25 Evaluate the following double integral over the region R
in
Calculus
$\tiny 15.1.25$ $\textsf{Evaluate the following double integral over the region R}\\$ $\textit{note: the R actually is supposed be under both...
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4 replies  53 view(s)
Today,
10:48
MarkFL
replied to a thread
The Fonz and Geometry
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Chat Room
Yes, and I was just pointing out that there can be other reasons a student fails besides lack of innate ability to understand the material, or an...
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5 replies  63 view(s)
Today,
10:18
MarkFL
replied to a thread
The Fonz and Geometry
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Chat Room
If a child's parents consistently put a child down, then I think this can have negative consequences on the child. I think there are a great many...
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5 replies  63 view(s)
Yesterday,
23:08
MarkFL
replied to a thread
Students Fear Word Problems
in
Chat Room
I disagree with this...I think it is the societal attitude that it's okay to fail at math that is part of the problem. Someone says to their friends,...
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9 replies  94 view(s)
Yesterday,
22:23
MarkFL
replied to a thread
Probability of 3 people ending up on same team?
in
Basic Probability and Statistics
If we have 2000 people, 300 of which are women, then the probability that all 300 women will be on the same team is given by: P(A)=\frac{{1700...
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5 replies  51 view(s)
Yesterday,
22:01
MarkFL
replied to a thread
Probability of 3 people ending up on same team?
in
Basic Probability and Statistics
I think your second method is correct. Suppose we call the teams $X$ and $Y$...and now we need only look at one team, so let's look at team $X$. If...
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5 replies  51 view(s)
Yesterday,
19:04
MarkFL
replied to a thread
Solar Eclipse 2017
in
Chat Room
Yesterday during the big event, we had pervasive heavy cloud cover and intermittent rain. Today, sunny and clear all day. Story of my life...(Giggle)
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8 replies  233 view(s)
August 21st, 2017,
18:57
karush
replied to a thread [SOLVED]
t12.3.11 Find the angle between vectors
in
Calculus
$\tiny{t12.3.11}\\$ corrected $\textsf{Find the angle between vectors}$ \begin{align*}\displaystyle...
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2 replies  71 view(s)
August 20th, 2017,
01:29
MarkFL
posted a
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on
Peter's
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Hey Peter! (Wave) I edited your post to remove the duplicate content. Sorry for the late reply, I was busy "powering through" a tedious 3 hour...
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August 19th, 2017,
18:54
karush
started a thread [SOLVED]
t12.3.11 Find the angle between vectors
in
Calculus
ok don't know the book answer but think this is ok suggestions welcome:cool: $\tiny{t12.3.11}\\$ $\textsf{Find the angle between vectors}$...
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2 replies  71 view(s)
August 17th, 2017,
15:03
karush
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
\sqrt{105\left(\frac{1}{105} \right)^2 2 \left(\frac{1}{105} \right)+3}=\sqrt{\frac{314}{105}} really ???
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8 replies  174 view(s)
August 17th, 2017,
02:10
MarkFL
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
Small quibble...axis of symmetry is: t=\frac{1}{105} So, since the parabola opens up, the vertex is a minimum, so the minimum distance will be...
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8 replies  174 view(s)
August 17th, 2017,
01:35
karush
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
the axis of symmetry is $x=\frac{1}{105}$ the parabola opens up $105\left(\frac{1}{105} \right)^2 +2 \left(\frac{1}{105} \right)+3$ ...
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8 replies  174 view(s)
August 17th, 2017,
00:59
MarkFL
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
For a parabola of the form: f(x)=ax^2+bx+c We know the axis of symmetry is at: x=\frac{b}{2a} So, for:
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8 replies  174 view(s)
August 16th, 2017,
23:09
karush
replied to a thread
231.12.3.65 Determine the smallest distance between a point and a line
in
Calculus
$\textsf{that turns out to be a parabola}\\$ $\textsf{$(4t1)^2 + (5t1)^2 + (8t1)^2 =105 t^2 + 2 t + 3$}\\$
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8 replies  174 view(s)
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November 24, 1944 (72)
About karush
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Wahiawa, Hawaii
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retired from Architecture and Surveying
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August 23rd, 2017
22:00 
karush
clicked Thanks for this post:
Re: 15.1.25 Evaluate the following double integral over the region R
by
MarkFL
The region $R$ is a...
16:40 
karush
clicked Thanks for this post:
Re: 15.1.25 Evaluate the following double integral over the region R
by
MarkFL
As for the $\LaTeX$,...
August 19th, 2017
21:32 
karush
clicked Thanks for this post:
Re: t12.3.11 Find the angle between vectors
by
skeeter
$\sqrt{(\sqrt{3})^2+(7)^...
August 17th, 2017
16:05 
MarkFL
clicked Thanks for this post:
Re: 231.12.3.65 Determine the smallest distance between a point and a line
by
karush
\sqrt{105\left(\frac{1}{...
August 16th, 2017
23:13 
karush
clicked Thanks for this post:
Re: 231.12.3.65 Determine the smallest distance between a point and a line
by
HallsofIvy
Any line can be written...
22:56 
karush
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Re: 231.12.3.65 Determine the smallest distance between a point and a line
by
skeeter
$\tiny{231.12.3.65}$...
August 15th, 2017
19:18 
karush
clicked Thanks for this post:
Re: s10.03.25 Write complex number in rectangular form
by
greg1313
It is merely the...
17:46 
karush
clicked Thanks for this post:
Re: s10.03.25 Write complex number in rectangular form
by
greg1313
$$\sin\left(\frac{7\pi}{4...
05:51 
greg1313
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Re: 12 DeMoivre's theorem
by
karush
OK this is for my...
August 14th, 2017
21:53 
karush
clicked Thanks for this post:
Re: 12 DeMoivre's theorem
by
greg1313
Brilliant solution,...
21:48 
MarkFL
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Re: 12 DeMoivre's theorem
by
karush
7187 this was it!
21:42 
greg1313
clicked Thanks for this post:
Re: 12 DeMoivre's theorem
by
karush
7187 this was it!
21:42 
greg1313
clicked Thanks for this post:
12 DeMoivre's theorem
by
karush
Find product...
21:37 
greg1313
clicked Thanks for this post:
Re: 12 DeMoivre's theorem
by
karush
$\cis$ means:...
17:53 
I like Serena
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Re: 12 DeMoivre's theorem
by
karush
its fine very useful...
17:50 
karush
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Re: 12 DeMoivre's theorem
by
I like Serena
ok its not in the...
17:11 
karush
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Re: 12 DeMoivre's theorem
by
I like Serena
by cis do you mean...
15:35 
karush
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Re: 12 DeMoivre's theorem
by
MarkFL
In case you're wondering...
August 13th, 2017
13:41 
karush
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Re: 12 DeMoivre's theorem
by
MarkFL
im pretty sure that's...
13:34 
karush
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Re: hcc8.11 change each to complex form and find product
by
greg1313
What you're asking is...
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