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The Unofficial Homework Help Thread

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LoathesRaisins
Posts: 3612 - Karma: 4,735
If you need help with any of your homework post it here. Maybe someone here can help you with it.
Sep 17 2012 10:10PM
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chicken
Posts: 6843 - Karma: 2,122
is the density constant?
Oct 17 2012 3:30AM
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chicken
Posts: 6843 - Karma: 2,122
I know how to do this for both uniform density, or a density function. is this for multivariable calc?

i'm going to sleep now though. can take a quick look at it in the morning if you still are having problems.
Oct 17 2012 3:33AM
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RedEyeTheJedi
Posts: 443 - Karma: 30
Can some one help a niiigro out with a mathematics problem?

S=6gr^2
Oct 18 2012 10:13PM
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RedEyeTheJedi
Posts: 443 - Karma: 30
solve for g
Oct 18 2012 10:22PM
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Darth.Maul
Posts: 2472 - Karma: 652
S/6r^2
Oct 18 2012 10:30PM
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Darth.Maul
Posts: 2472 - Karma: 652
That almost seemed too easy. is it 6gr^2 or (6gr)^2
Oct 18 2012 10:32PM
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BrewskiJr
Posts: 5738 - Karma: 1,478
I need Finance help on my Excel project. I'm trying to set up a function on Excel to help find the price of a stock at period "insert period #".

Say your given this:
Discount rate: 9%
Dividend paid at 0: $1.50
Constant Growth Rate: 5%


this has to be for Excel. PM if you have an answer! +10/10k if its right
Oct 18 2012 10:36PM
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chicken
Posts: 6843 - Karma: 2,122
is it the formula you don't know, or how to set it up into excel?
Oct 19 2012 1:20PM
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Darth.Maul
Posts: 2472 - Karma: 652
Chicken I need your physics nerdiness to help me with Hydrostatic force on a plate in calculus!

You have a with 4 equal sides of length a submerged in water so that the corner is at the surface of the water. How the fuck do you do hydrostatic force on that shit?
Oct 19 2012 4:03PM
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chicken
Posts: 6843 - Karma: 2,122
is the plate vertical?

it's been awhile since I have done this but I am getting an answer of

F=-(2pga^3)/3

where p is the density and g is acceleration due to gravity on earths surface, both taken to be constant parameters in my calculation. note that you could also use a weight density and then it would be

F=-(2wa^3)/3

if this is correct I can explain it, if not I'll take a better look at it.

as far as I can tell this is a basic single variable calculus problem, since the force only depends on depth. Also obviously this is for the force acting on just one side of the plate, the net force will be zero (the plate will not accelerate horizontally in a static body of water).
Oct 19 2012 5:38PM
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chicken
Posts: 6843 - Karma: 2,122
oops I made a huge mistake, that is not the answer. accidentally treated this as a triangle haha.
Oct 19 2012 6:11PM
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I.B
Posts: 8137 - Karma: 24,354
Need help...
Matching shit

1 : The text discusses two actors and how they approached the same role.

2 : The text discusses a strategy for weight loss.

3 : The text discusses a couple's first meeting.

4 : The text discusses what freedom means to a prisoner of war.

5 : The text discusses why soccer is the best sport for young children.

6 : The text discusses a famous painting.

7 : The text discusses the author's work experience and skills.

8 : The text discusses a family trying to decide whether or not to adopt a dog.

9 : The text discusses different kinds of friendship.

10 : The text discusses what creates mass murders and how they change communities.

11 : The text discusses the rating for a local restaurant.



: Exemplification
: Pro-con
: Narration
: Description
: Procedural analysis
: Cause-effect
: Comparison-Contrast
: Argumentation
: Evaluation
: Classification
: Definition
Oct 22 2012 11:57AM
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Caspaaa
Posts: 4830 - Karma: 1,465
10 is probably cause - effect

4 is definition?

8 might be pro-con

9 might be compare-contrast

11 might be evaluation

7 might be description



fuck the problem is that A LOT of these could be more than one answer.....
Oct 22 2012 12:30PM
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I.B
Posts: 8137 - Karma: 24,354
I FUCKING KNOW> I"M LIKE QWHAT THE FUCKERY.

Fuck this school shit nigga.
Oct 22 2012 12:33PM
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dompuch
Posts: 1446 - Karma: 1,167
wish someone could help with my public speaking class, either way Threads fo later
Oct 22 2012 12:39PM
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LoathesRaisins
Posts: 3612 - Karma: 4,735
I find making the audience laugh makes public speaking a breeze.
Oct 25 2012 12:05AM
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jameskiy
Posts: 396 - Karma: 3
log^x 81 =4, k for all and if you could show me how, even though this is easy as
Oct 29 2012 4:32AM
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Malcolm
Posts: 15949 - Karma: 9,431
Don't study a script word for word or else it'll sound rehearsed. Make notes on what you're talking about and study those.
Oct 29 2012 5:50AM
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chicken
Posts: 6843 - Karma: 2,122
when you say log do you mean ln or log_10?
Oct 31 2012 6:58PM
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Realist
Posts: 90 - Karma: 91
So I couldn't do this problem (basic geometry, but even my teacher couldn't figure it out).

Click for larger image

The answer in the back of the book is m=84 degrees, but it's perplexing me on how to get there. I work through it and come out with answers that do not work. I need to write a detailed explanation of the steps, so any help given will need to be explained to a degree. Thanks guys!!

P.S. That vertex I forgot to label is P
Nov 13 2012 8:27PM
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Realist
Posts: 90 - Karma: 91
bump
Nov 13 2012 8:59PM
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Darth.Maul
Posts: 2472 - Karma: 652
What makes it worse is that it's not drawn to scale. Cause theres no way that Angle Q is 42 degrees in that picutre. But I'll keep looking it over.
Nov 13 2012 9:20PM
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Realist
Posts: 90 - Karma: 91
I got it so that 'a' in 48 degrees, but that would make N an obtuse angle, which doesn't work with the diagram.
Nov 13 2012 9:25PM
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chicken
Posts: 6843 - Karma: 2,122
if you tell me what little m means I will answer this for you. I can do this geometry easily but am a little unsure about the notation (doesn't help that the image is fuzzy)
Nov 13 2012 10:42PM
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LoathesRaisins
Posts: 3612 - Karma: 4,735
Are these like proofs and stuff?

Nov 13 2012 10:48PM
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Realist
Posts: 90 - Karma: 91
I mistyped. little m is actually 'M' so it's angle M=84 degrees. That's not in the given though, and I can't use it to solve.
Nov 13 2012 11:02PM
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profa_212
Posts: 8633 - Karma: 32,533
Have to give a speech tomorrow and haven't even started. We have to bring in an object in and give a story that relates to it. I was thinking of bringing my ski helmet. Anybody know how I could make some bullshit story last 2 minutes?
Nov 13 2012 11:11PM
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Forcillo
Posts: 3801 - Karma: 3,580
"This, to all of you, may appear to be simply a ski helmet. However, to me, it is much more. I have had this same helmet for X amount of years, and it has seen its fair share of crashes. This past winter, though, my ski helmet saved my life."

Then just make up a bullshit story about how you had a massive crash and hit your head. Then say how you went to the doctor the next day and they said you would have died had you not been wearing your helmet. Boom.
Nov 13 2012 11:33PM
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Pikachu.
Posts: 1290 - Karma: 1,641
might have something to do with the fact that angle a and b both open up to MQ. i forget what that means tho
Nov 13 2012 11:39PM
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chicken
Posts: 6843 - Karma: 2,122
I was a bit cocky, just looked at it and don't think I can figure it out. I'm not quite sure what the question is asking but just asked for help with that haha.
Nov 14 2012 1:18AM
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.AR6rider.
Posts: 15976 - Karma: 8,799
The only way the math works out is if you assume the angles in the middle are 90 degrees, which I don't think they are haha.

Anyway...

angle Q (42) + middle angle (assumed 90) + angle b = 180. Angle b = 48

2b + angle MPN = 180. angle MPN = 180 - 96 = 84.

Angle Q + angle QPN (b + MPN) + angle a = 180

42 + 48 + 84 + a = 180. Angle a = 6

Angle a (6) + middle angle (assumed 90) + angle M = 180

180 - 96 = angle M = 84


...and as I'm typing all of this out I realized that if we're assuming the middle angles are each 90 degrees and QN bisects angle N, angle MPN and angle M would be equivalent, so you could just stop after like the second step. Pretty sure this doesn't even matter since the middle angles do not appear to be 90 degrees, but whatever. I'm bored.
Nov 14 2012 2:07AM
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Darth.Maul
Posts: 2472 - Karma: 652
The whole picture seems to be out of proportion and I can't find a possible solution without making assumptions like that.

My assumtions were that the 2 sides were parallel and that angle Q applied to just one of the two angles at that corner. That way its easy that 42x2=84 and angle M would follow because of the transversal rules or whatever teh hell they are called. (Its been 9 years since geometry for me...)
Nov 14 2012 2:48AM
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Darth.Maul
Posts: 2472 - Karma: 652
Did you draw the picture? (OP of question...)
Nov 14 2012 2:49AM
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chicken
Posts: 6843 - Karma: 2,122
I looked at it for a solid 15 mins and couldn't figure it out. two grad students (one in physics, one in math) looked at it and haven't figured it out yet. is there some other assumption we get with this? or just the three the question gives? do points NPR all lie on a straight line?
Nov 14 2012 4:00AM
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chicken
Posts: 6843 - Karma: 2,122
but just to be sure. please clarify what angle you are looking for. angle M is ambiguous.
Nov 14 2012 4:03AM
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Phil-X-
Posts: 7205 - Karma: 14,399
Made a thread, but ill try in here too. +k for help


I have to write my term paper about an article (that has to relate directly towards macro.), if youve looked at any good ones recently, and think they'd work, post um up.

I have a few, but I dont really like them at all, maybe someone has something better

More specifically-

The topic of the paper must be related to Macroeconomic issues covered in Econ
this semester. Remember that Macroeconomics deals with the economy as a whole so do not choose a topic restricted to an individual, a specific fi rm or sector of the economy.
Pick the topic that you like the most. Some examples are: monetary policy, taxes,
government expenditure, exchange rate, etc.

The article you are using must have been published after August 22th, 2012. NO AR-
TICLE published before that will be accepted (the paper will receive zero points)
 Look at reputable news sources (such as the Wall Street Journal, The Economist,
New York Times, etc) for articles
Look for articles that contain facts (such as the Federal Reserve raised interest
rates). The articles may discuss causes, consequences, etc of these facts. This
will make it much easier for you to do an economic analysis of the topic. You can
then write about what economic theory says about the issue, what happened in
the real world, and how the article handles the topic.
Nov 14 2012 4:08AM
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Realist
Posts: 90 - Karma: 91
Points NPR are colinear, and RPM in an exterior angle for triangle PMN. The question is asking for angle M. Other than that and the other givens, there are no clues. I'm pretty sure it's an unreasonable question for 9th grade geometry, but idk. I'm gonna ask my teacher later and see what she says.
Nov 14 2012 8:36AM
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Forcillo
Posts: 3801 - Karma: 3,580
You have to use systems of equations to figure out one variable in order to get the rest. What I got is this:

(Using the interior angles of the dotted triangle - the whole thing.)
a+42=b
2b=measure of angle M+2a
You can get a+42=b because an exterior angle of a triangle (b) is congruent to the sum of the two remote interior angles (42 and a) You can set it equal to b because the exterior is the same as the interior

2(a+42)=measure of angle M+2a (substitution)
2a+84=measure of angle M+2a
84=measure of angle M (subtraction property of equality to get rid of the 2a's)

Sir you have your answer. I am very proud that I figured this out.
Nov 14 2012 11:04PM
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Forcillo
Posts: 3801 - Karma: 3,580
Whiteboard work if my response is confusing:

Click for larger image

Nov 14 2012 11:07PM
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Darth.Maul
Posts: 2472 - Karma: 652
I knew that he drew the diagram wrong. Because the way he drew it, it is impossible to solve.
Nov 14 2012 11:45PM
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NotoriousT.S.E
Posts: 1014 - Karma: 439
http://blogs.wsj.com/economics/2012/11/14/bono-warns-fiscal-cliff-cuts-will-hurt-worlds-poor/?mod=WSJBlog&mod=marketbeat lol do that
Nov 14 2012 11:52PM
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Darth.Maul
Posts: 2472 - Karma: 652
Incoming Bono, Master Economist. Look out guys. He knows his shit
Nov 14 2012 11:54PM
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~4EST_B_Skis~
Posts: 566 - Karma: -46
Lennie is a retarded fuckhole who happens to be strong as shit and kills, a mouse, a puppy, and Curleys wife.
Geroge is a small fuckhole who shoots lennie in the back of his head
the book is retarded, i fucking hated it
Nov 14 2012 11:59PM
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chicken
Posts: 6843 - Karma: 2,122
haha that was the problem?

I knew it had to be that I was misunderstanding the angle notation.
Nov 15 2012 2:40AM
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Phil-X-
Posts: 7205 - Karma: 14,399
BUTTT GEEORRGEEE
Nov 15 2012 2:46AM
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chicken
Posts: 6843 - Karma: 2,122
OH MY GOD. it all makes sense to me now. If that picture hadn't have been there I would have figured this out in like 30 seconds haha. I had completely forgotten what m
Nov 15 2012 2:46AM
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1440ski
Posts: 2049 - Karma: 1,110
++++k if anyone can help with this one!

The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female Hispanic drivers in Boston; 68 of these drivers were wearing seat belts. We wish to find if these data give good reason to conclude that more than half of Hispanic female drivers in Boston wear seat belts.

What is the sample proportion pˆ of female drivers that wear seat belts?
A.0.1170B.0.4188C.0.5812D.0.6800
Nov 19 2012 10:31PM
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chicken
Posts: 6843 - Karma: 2,122
the sample proportion would just be the fraction of them wearing seatbelts.
Nov 19 2012 10:40PM
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volvotom
Posts: 2045 - Karma: 712
I write undergrad papers, will do pretty much any lower division course. PM me
Nov 20 2012 2:36AM
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Darth.Maul
Posts: 2472 - Karma: 652
Lol. Too bad my conscience would kill me doing that...
Nov 20 2012 3:31AM
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