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Math Help - Percentage increases

  1. #1
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    Percentage increases

    You have 4,028,000,000 for the population in Asia and 305,000,000 for North America...Then you have 17,400 for the area in Asia and 9,400 for the area of North America.

    I need to know how to find the percentage difference.

    My question asks me this: Compare the population per square mile (land area=1,000mi squared) in Asia to the population per square mile in North America for the year 2000.

    The numbers above are what is listed for the year 2000. How do I work this problem?
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  2. #2
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    Let A = Asians population,
    Let B = North American population,
    Let C = area of Asia, presumably in square miles,
    Let D = area of North America, also in square miles.

    I don't know if these land areas are even close to correct, and I don't plan to look it up as it will not matter to the method of solution. And I also do not know where "(land area=1,000mi squared)" is supposed to fit in this particular problem.

    The population density is found by (population/area), so for Asia that is A/C, and for North America that is B/D.

    ( (B/D) / (A/C) ) should give you a percentage comparison, i.e., that the population density of North America is some percentage of the population density of Asia.

    I hope this helps.

    Bye.
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  3. #3
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    Hello,

    Quote Originally Posted by Bradley View Post
    Let A = Asians population,
    Let B = North American population,
    Let C = area of Asia, presumably in square miles,
    Let D = area of North America, also in square miles.

    I don't know if these land areas are even close to correct, and I don't plan to look it up as it will not matter to the method of solution. And I also do not know where "(land area=1,000mi squared)" is supposed to fit in this particular problem.

    The population density is found by (population/area), so for Asia that is A/C, and for North America that is B/D.

    ( (B/D) / (A/C) ) should give you a percentage comparison, i.e., that the population density of North America is some percentage of the population density of Asia.

    I hope this helps.

    Bye.
    You should learn about latex, it's always better to make things understandable (I'm not talking for here )

    land area=1,000mi squared
    This means that you have to multiply 17400 and 9400 by 1000.

    But it doesn't matter
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  4. #4
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    Judging from the results of a Google search below, I could use the remaining time left in my life reading about LaTex without ever acquiring the software editor to actually use LaTex.

    If you know a source that simply supplies the software and a minimal instruction set, that would go a long way towards remedying the situation.

    By the way, I have never had a problem sending email formatted with MS Excel and other common applications used worldwide. The vast majority of users of the Internet communicate via email using the same applications. They have no problem with it as far as I can tell. Not surprisingly, relatively few have a need to make this task more difficult by clinging to LaTex as if they are thinking, "The ancient wise one supplied us with LaTex and we can do no better."


    Latex Math Symbols
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    help on latex math symbols

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    [PDF] Math into L T E X

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    An Introduction to Latex

    -------------------------------------------------------------------
    etc., ad nauseum. I have a life. Sometimes I want to send math text to someone. Adopting LaTex from my point of view (and in the view of millions of others) would be done solely to fill a desire to communicate with poeple who cannot or will not adapt to a far more popular and practical standard.

    So as I mentioned above, if you could point me to a source for LaTex editing software and minimal instruction sent, that would help accomplish the task. There seems to be a wide variety of sects to consider when choosing which of the many versions to adapt. Which one is right? Are they all supported by this particular site?

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  5. #5
    Moo
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    Hi !

    Don't take it that bad o.O

    It just comes with habit and it was a suggestion
    It's rather clearer when you use the LaTeX when it comes to explain to people in forums :P


    There is a link I like much, it's this one : http://amath.colorado.edu/documentat...eX/Symbols.pdf

    There are the basis (especially §2, 3 and 4) and ... well, for more complicated stuff, if you want to learn, just click on the latex images ou can encounter in this forum ^^


    Have a nice evening
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    Quote Originally Posted by Bradley View Post
    Judging from the results of a Google search below, I could use the remaining time left in my life reading about LaTex without ever acquiring the software editor to actually use LaTex.


    You could indeed spend a very long time learning every little aspect and caveat of \text{\TeX} and \text{\LaTeX}, just as you could spend several lifetimes trying to learn every detail in every branch of mathematics. But you do not need to. It only takes a few minutes to learn the very basics of the typesetting system, and maybe a few hours to get acquainted with the software. The rest you can pick up as you go.

    Quote Originally Posted by Bradley View Post
    If you know a source that simply supplies the software and a minimal instruction set, that would go a long way towards remedying the situation.


    A very easy to use \text{\TeX} implementation for Windows is MiKTeX. Other implementations, including the standard distribution and command-line tools, can be found at the
    Comprehensive TeX Archive Network, specifically here.

    Quote Originally Posted by Bradley View Post
    Not surprisingly, relatively few have a need to make this task more difficult by clinging to LaTex as if they are thinking, "The ancient wise one supplied us with LaTex and we can do no better."


    Your WYSIWYG editors are fine for most tasks. On this board, however, a simple pair of [math][/tex] tags will allow you to very easily typeset beautiful mathematics with little effort.

    Quote Originally Posted by Bradley View Post
    etc., ad nauseum. I have a life. Sometimes I want to send math text to someone. Adopting LaTex from my point of view (and in the view of millions of others) would be done solely to fill a desire to communicate with poeple who cannot or will not adapt to a far more popular and practical standard.


    More popular and practical? \text{\TeX} is still the de facto standard when it comes to typesetting mathematical works. Most mathematics, physics, and computer science journals are typeset in
    \text{\TeX}, as are many books.

    \text{\TeX} offers a much finer control over the appearance of your type than your WYSIWYG editors, and it usually produces a much higher quality output.

    Quote Originally Posted by Bradley View Post
    So as I mentioned above, if you could point me to a source for LaTex editing software and minimal instruction sent, that would help accomplish the task. There seems to be a wide variety of sects to consider when choosing which of the many versions to adapt. Which one is right? Are they all supported by this particular site?
    If you are just using \text{\LaTeX} on this forum, you do not need any software. As for a minimal instruction set, see this simple tutorial.

    Look how easy it is:

    Typing
    [math]x^3 + 3x^2 - 4x + 1 = 0[/tex] produces x^3 + 3x^2 - 4x + 1 = 0 and typing [math]\int_0^\pi\sin x\,dx[/tex] produces \int_0^\pi\sin x\,dx
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