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Math Help - help me plz exam tommorow need srs help

  1. #1
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    Unhappy help me plz exam tommorow need srs help

    K pretty much i thought i had everything aced and ready, but then i found out about a whole other section of stuff i don;t know. for example this question which counts for most fo the grade on the test:

    "Timber increases in value (appreciates) by 2% each year. If a consignment of timber is currently worth $100 000:

    a). Express the value of the timber, P dollars, as a function of time, t, where t is the number of years from now.
    b). What will be the value of timber in 10 years?

    ....can someone explain wtf? this all means?
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  2. #2
    Member Awsom Guy's Avatar
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    Sorry I am wrong Hail you Bacterius.
    Last edited by Awsom Guy; March 15th 2010 at 12:29 AM.
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  3. #3
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    Quote Originally Posted by Swicked View Post
    K pretty much i thought i had everything aced and ready, but then i found out about a whole other section of stuff i don;t know. for example this question which counts for most fo the grade on the test:

    "Timber increases in value (appreciates) by 2% each year. If a consignment of timber is currently worth $100 000:

    a). Express the value of the timber, P dollars, as a function of time, t, where t is the number of years from now.
    b). What will be the value of timber in 10 years?

    ....can someone explain wtf? this all means?
    can i like quit life cause i'm so stressed i'm seeing bright lights.....
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  4. #4
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    Quote Originally Posted by Swicked View Post
    can i like quit life cause i'm so stressed i'm seeing bright lights.....
    omg to dude that replied you are the most awesome dude in the history of dudes
    ...non-gay
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  5. #5
    Member Awsom Guy's Avatar
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    hehe I know no problem mate...
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  6. #6
    Super Member Bacterius's Avatar
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    Chill, man, your life's not gonna end because you fail an assignment. And, if you fail it, think of it as something that had to happen somehow.

    Think about it : what is 2% of $100000 ? Isn't that \frac{100000}{100} \times 2 ? So the first year we get 100000 + \frac{100000}{100} \times 2, right ? Now take this result as a number and apply the idea again. You should find a general formula that will give you the value of timber given the years from now And then question b) is basically pluggin' in the number.

    PS : please avoid the F word ... there are all-age people on this forum and we don't necessarily need to see this.

    PS2 : by the way Awsom Guy, your answer is wrong. This doesn't take into account the increasing value of T and thus the increasing value of 2% of T.
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  7. #7
    Member Awsom Guy's Avatar
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    what you mean is chilax.
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  8. #8
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    ummmm could u explain the answer just a little more though so i can rememebr it for tommorow.
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  9. #9
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    Quote Originally Posted by Bacterius View Post
    Chill, man, your life's not gonna end because you fail an assignment. And, if you fail it, think of it as something that had to happen somehow.

    Think about it : what is 2% of $100000 ? Isn't that \frac{100000}{100} \times 2 ? So the first year we get 100000 + \frac{100000}{100} \times 2, right ? Now take this result as a number and apply the idea again. You should find a general formula that will give you the value of timber given the years from now And then question b) is basically pluggin' in the number.

    PS : please avoid the F word ... there are all-age people on this forum and we don't necessarily need to see this.

    PS2 : by the way Awsom Guy, your answer is wrong. This doesn't take into account the increasing value of T and thus the increasing value of 2% of T.
    yeh sorry about the thata just stressed as hell like there a whole other pile of stuff i need to learn it's just that question that counts for 50% but yeh thx for your much needed and appreciated help
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  10. #10
    Super Member Bacterius's Avatar
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    @Awsom Guy : the first year, timber increases by 2%, therefore it is $102000. The next year, the new value increases by 2%, therefore it is $104040, etc ... please correct your formula as to not make Swicked fail ...
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  11. #11
    Member Awsom Guy's Avatar
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    Damn I got it wrong. Sorry
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  12. #12
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    Quote Originally Posted by Bacterius View Post
    @Awsom Guy : the first year, timber increases by 2%, therefore it is $102000. The next year, the new value increases by 2%, therefore it is $104040, etc ... please correct your formula as to not make Swicked fail ...
    can you buy any chance make sense of this question it is a simultaneous equation which i have to sketch as a graph , label the intercepts and state their value...i'm usually pretty good at tehses but this ones like insanely...out...there:


    y= 4√(x+4) -2
    y= ⅔x +7

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  13. #13
    Member Awsom Guy's Avatar
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    Soo sorry I am stuck on a maths question my Integrals hehe and I got confused sorry Swicked so much dude I gotta chilax my self
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  14. #14
    Super Member Bacterius's Avatar
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    Let us define 2% of a number x as \frac{2x}{100}. The increase of a number x of 2% can be defined as x + 2\% = x + \frac{2x}{100} = \frac{102x}{100}. Now consider the first year : we increase $100000 by 2%, therefore the new price will be :

    \frac{102 \times 100000}{100}

    Consider the second year : we increase the actual price by 2% again :

    \frac{102 \times \frac{102 \times 100000}{100}}{100} = \frac{\frac{102^2 \times 100000}{100}}{100} = \frac{102^2 \times 100000}{100^2}

    Can you spot the pattern ? Why should it stop ? (always check up to three consecutive cases though, I'm lacking time here). Your general rule becomes that the price of timber T in function of the number of years P is given by the formula :

    \boxed{T = \frac{102^P \times 100000}{100^P}}

    Let's check results :

    P = 0, \ T = 100000
    P = 1, \ T = 102000
    P = 2, \ T = 104040
    P = 3, \ T = 106120.8

    And you are all good to check for P = 10. Maths is cool eh

    PS : what I wrote is correct by the way, and I guarantee it.
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  15. #15
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    Quote Originally Posted by Awsom Guy View Post
    Soo sorry I am stuck on a maths question my Integrals hehe and I got confused sorry Swicked so much dude I gotta chilax my self
    it's k dude at least you tryed to help me all that matters instead of yelling random numbers and symbols at me like my teacher
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