Archived threads in /sci/ - Science & Math - 1817. page

>>7954881
Markov Chains Bruh.

Wow thanks, last question.

Suppose someone own 3 pairs of pants, 7 hats, and 8 boxer briefs. All clothing is a different color. What is the probability that they will wear a red hat or yellow pants?

>>7954891
Assuming that the event of choosing a hat is independent from choosing a pant, the intersection should be

[math]P(A\cap B)=P(A)\cdot P(B)[/math]

Where P(A) is probability of a red hat and P(B) is probability of a yellow pant. Since each clothing is a different color, and assuming each article of clothing contains at least one of the desired colors, P(A)=1/7 and P(B)=1/3

[math]P(A\cap B)=(1/7)(1/3)=(1/21)[/math]

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Okay simplification.

How do I solve for ?

>>7954608
But then I also need the radius of the circle...

Pls help

the sticky explains this

dont take stims anymore and only take them when your studying the material a few days before a test. you already dungoofed

>>7954507
so kill myself, roger that

OP, never do any real drugs, if you can't handle this anything hard will kill you
Can you even drink coffee without going overboard?

>>7954376
Just go work for a physics factory when you graduate.

>>7954376
bumb :DD

>>7954390
>tfw local math factory isn't hiring
fml

Dont take the full pill, cut it in half. Otherwise you'll get all spacey.

Expect your pee to be bright yellow and smell like sulfur, and to be in a very trance like state.

That's about it

>>7954342
Damn, I bought this stuff to help study, not to talk to aliens and become a chemical factory.

Also just found theres another thread. Deleting this in a bit

>>7954331
Don't take 5 in one day.

Common ground is a good way to go. I mean she's not entirely wrong, the homeopathic side to medication is quite important. Support, love and attention are important matters in recovery, as is anything else that makes the patient feel "good" and be more motivated to getting better.

However, the body isn't infallible in it's recovery. That's the point that you have to explain to them, and note that a combination of the two treatment types is the best option.

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This isn't your personal blog site,no one wants to hear about the fedora tier arguments with your parents.

My advice would be to get off of your high horse. If there is one thing that science can prove, it's that humans are extremely gullible. They are humans the same as you. All the only difference between medicine and homeopathy is that one holds off death longer. Either way it will fail you in the end.

Thin sheet of aluminium foil will reflect radio waves but not radiation. Only multiple coated leads can stop hazardous radiation.

http://web.archive.org/web/20100708230258/http://people.csail.mit.edu/rahimi/helmet/

>>7954069
And unless you cover your entire body in aluminum foil, it'll actually bounce radio waves inside of your head.

> 100% evenly distributed thought races
No. wtf ofcourse not

>>7954062
this what some people actually believe tho

>>7954066
So what ? Retards will believe in anything.
Do you really think God exists and he made all men equal ? Completely throwing out the fact that evolution treated everyone differently ?

>>7953968
People forgo reason to be liked. Look at secularists, instead of them arguing against the irrationality of faith they adopt this bullshit co-exist bullshit to avoid conflict.

Math grad here, doing pretty well.
This year I tried to go hermit mode (no roommate, go home after class/work) and I thought it worked pretty well. I am fairly introverted and I don't really like to have people in my place when I don't want them there. That being said, I'm particularly antisocial, I do enjoy talking to people, parties (if I have friends with me) etc. I just don't like having people at home all the time.
I don't think the other people who came in the same year as I did are particularly antisocial either.
Many are somewhat introverted but not to the point of shutting everyone out: They have friends they see regularly, they talk to people etc. Some are also involved in the student association and plan parties and other events.

>>7953968

Jeez you seem like a butthurt social butterfly.

Anyway what leadership workshop is this, that seems strange there are plenty of antisocial folks that are just idiots.

>>7953894
>Wouldn't the room be filled with carbon dioxide?

It would be if it was airtight, yes. But it's not.

>>7953894
You breath in oxygen and carbon dioxide, you breath out slightly less oxygen and slightly more carbon dioxide.

>>7953894
If you sleep with a plastic bag over you head, you might die. But a whole fucking room is just too big and contains too much oxygen.

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Thats theoretical physics for you

>>7953875
is there any other experimental evidence of dark matter besides "the observed mass of the universe doesn't add up to our calculations so there must be dark matter"?

It's not as crazy as MOND.

There is other evidence for dark matter:
http://scienceblogs.com/startswithabang/2011/04/20/how-gravitational-lensing-show/

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shameless self bump.

>>7953825
No idea,
But it's definitely worth more than this website.

>>7953857

well, that's a given.

you have two options:

do you want to start at to VERY beginning and work to calculus?

do you want to learn about limits / derivatives / integrals (most of HS calc) intuitively and not formally?

if you answer yes to the first one, first understand logical connectives (implies, iff, and, or, not) and quantifiers (universal and existential) to begin being able to write logical sentences about math, and learn about fundamental analysis concepts from the ground up (sequences, convergence, Cauchy sequences, subsequences) then you can define things like limits and translate your proofs from sequences into limits, and work formally upwards that way.

or fuck that: if you just want to have some intuition on what a derivative / integral / limit of a particular function, then start over at kahn academy and learn like the rest of us do when we're bored. sift through unhelpful wikipedia pages. buy an old college level calc text book. start at limits, the derivatives, the integrals.

what I did in high school was I watched the MIT open courseware 18.01 videos taught by Professor Jerison. Those videos are pretty fucking great and easy to follow along to. I also had a cheap copy of Stewart Calculus which I bought used for like $5 at a half price books. I did a lot of exercises out of there after watching the corresponding MIT lesson, as if I were actually taking the class. It worked ok for me imo.

OP I taught myself Calculus using the free website "Paul's Online Math Notes".
It is by far the best resource I can think of for this. Simply read the lesson, take notes on it all into your notebook, and then do the practice problems.

Here: http://tutorial.math.lamar.edu/

If you do that you will know calculus more than well enough to use in any other course that requires calculus.

Now if you REALLY want to understand calculus, you should read calculus textbooks. Not just ones that are designed for, say, engineers, which only cover the computations of calculus, but ones that teach you all the proofs and theory behind the math. These are important. This is what a mathematician would call "calculus."
For this, I recommend the book Calculus, Volumes 1 and 2 by Tom Apostol, as it is what I used, or Calculus on Manifolds by Michael Spivak, an absolute classic.

Now, if you really want to understand the foundations of calculus, then what you really want to study is analysis. Calculus is just the computation (caluculations) aspect of analysis, hence the name. An introduction to analysis, with some very basic topology and algebra as well, will teach you everything you could ever want to know about calculus and much more. Analysis is the field of math, and calculus is term that references the results and computational aspect of that field.

For analysis, I recommend reading Rudin's "Principles of Mathematical Analysis." This is a classic undergraduate text and the "bible" of basic analysis from which the field comes from. It is simple and but it must be read VERY SLOWLY. You have to actually sit there and think about every step of every proof and draw out why the proof is true and which connections were made. This book is difficult, but the good news is there is no prerequisite to learning it. You can know almost nothing about math and by simply forcing yourself to struggle through this book you will gain a foundation in analysis from which you can progress.

Is that true? Ima look that shit up senpai.

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>He graduated with a B.S. in mechanical engineering in 1977
No wonder most of what he says is B.S.

>>7953792
He didn't believe in anthropomorphic climate change till he got scolded on it.

Get psychiatric help

Not really. Bees are smart fuckers and they constantly coordinate. I doubt about the wasps though. Not that they aren't smart, but they don't give a shit about bees and usually attack them. They don't make honey either so they got no stake in protecting bee flocks.

Still, it might be a general bee territory and a dead bee might be triggering the fellow antenna fuckers. You should just get about 5-10 chameleons and place them around the strategic corners. They go through bee and hornets like butter.

>>7953768
Your last paragraph greatly discredited your validity, so let me rephrase your post.

>Bees, wasps, and hornets have interactions
>Such interactions are possible social communications between the species
>A communiction means a bond between to subjects.
>Ex. Bee dies, wasp inspects.
>ex cont. If wasp determines source thats killing off bees, wassbeehornets will retaliate
Are bees, hornets, and wasps more social than previously believed?

>my personal input
>bees have been dying to pollution
>bees reach out to similar species to help them survive
>ayylmaos start dumping their trash on earth
>humans reach out to apes to help them survive