Homework Help

Discussion in 'Random Chat' started by Elvenwriter, Apr 30, 2009.

  1. Meteorain

    Meteorain Magical & Mystical

    Joined:
    Dec 18, 2003
    Messages:
    17,139
    Likes Received:
    150
    Trophy Points:
    63
    Location:
    London
    Ratings:
    +150 / 0 / -0
    Edit: Nah that was wrong Kak.

    It's actually

    Interest / Time / Principal = Interest / Time * Principal

    Tbh though I'm a bit confused as to what the principal is...
     
    Last edited: Apr 30, 2009
  2. Kakashi

    Kakashi The Fighters Guide House Member

    Joined:
    Dec 21, 2005
    Messages:
    15,018
    Likes Received:
    306
    Trophy Points:
    0
    Location:
    In the hearts and minds of us all
    Ratings:
    +306 / 0 / -0
    Met, always with the smarts and the tricks with the math.
     
  3. Lord Yuan

    Lord Yuan Death-Thousand+

    Joined:
    Mar 31, 2009
    Messages:
    4,068
    Likes Received:
    125
    Trophy Points:
    63
    Location:
    Crystal Prison (space crime)
    Ratings:
    +162 / 0 / -0
  4. Elvenwriter

    Elvenwriter Mmmm, Spam

    Joined:
    Jan 1, 2009
    Messages:
    1,601
    Likes Received:
    30
    Trophy Points:
    0
    Location:
    Disappeared in the Music
    Ratings:
    +30 / 0 / -0
  5. Elvenwriter

    Elvenwriter Mmmm, Spam

    Joined:
    Jan 1, 2009
    Messages:
    1,601
    Likes Received:
    30
    Trophy Points:
    0
    Location:
    Disappeared in the Music
    Ratings:
    +30 / 0 / -0
    wait.... WHAT?!?! so, it's different than kaka said? helppppp
     
  6. Raff the Sweetling

    Raff the Sweetling Threadkiller

    Joined:
    Jul 6, 2008
    Messages:
    1,421
    Likes Received:
    46
    Trophy Points:
    0
    Location:
    My own personal hell
    Ratings:
    +46 / 0 / -0
    Well if they arent asking for the answer, they want a formula for figuring out the answer correct?
     
  7. Elvenwriter

    Elvenwriter Mmmm, Spam

    Joined:
    Jan 1, 2009
    Messages:
    1,601
    Likes Received:
    30
    Trophy Points:
    0
    Location:
    Disappeared in the Music
    Ratings:
    +30 / 0 / -0
  8. Raff the Sweetling

    Raff the Sweetling Threadkiller

    Joined:
    Jul 6, 2008
    Messages:
    1,421
    Likes Received:
    46
    Trophy Points:
    0
    Location:
    My own personal hell
    Ratings:
    +46 / 0 / -0
    I guess I know how to figure out the mystery number, but not how exactly it should be written in formula. I do know this formula (raff+math=retarded squared) Sorry I cant help more. The first question can be figured out by multiplying, and the second by dividing though as we said before. How that translates into a formula.....*throws hands up*
     
  9. Mububban

    Mububban Administrator Staff Member

    Joined:
    Aug 12, 2003
    Messages:
    4,705
    Likes Received:
    144
    Trophy Points:
    63
    Location:
    West Australia
    Ratings:
    +186 / 1 / -0
    This is one step removed from Spam so I've moved it into the Random Chat section
     
  10. ~Elladan~

    ~Elladan~ A Elbereth Gilthoniel

    Joined:
    Aug 21, 2006
    Messages:
    4,908
    Likes Received:
    215
    Trophy Points:
    63
    Location:
    England
    Ratings:
    +225 / 0 / -0
    To be honest all the solutions given to the original question are simplistic as they take no account of compounding (interest on interest) :)

    If compounded the formula is:

    I = (P(1+R)^n)-P

    (Note: ^n = raise to the power of ~ can't do superscript characters on forum)

    The simplified non-compounded formula (as stated by others) is:

    I = P*R*n

    If using simple formula (ignoring compounding)

    R = I/(P*n)

    (I=interest earned, P=principal, R=interest rate as a decimal, n=no of years)
     
    Last edited: May 1, 2009
  11. Meteorain

    Meteorain Magical & Mystical

    Joined:
    Dec 18, 2003
    Messages:
    17,139
    Likes Received:
    150
    Trophy Points:
    63
    Location:
    London
    Ratings:
    +150 / 0 / -0
    That's what I said! :p

    Well....only when simplifying.
     
  12. darkfox

    darkfox New Member

    Joined:
    Apr 3, 2009
    Messages:
    367
    Likes Received:
    12
    Trophy Points:
    0
    Ratings:
    +12 / 0 / -0
    wow. you guys. no accountants in the house...or even people who passed grade 11 math it seems. (edit: apologies, elladan got it.)

    compound interest folks.

    here's how you figure it out elven

    $100 * 1.04 = $104 (first year with interest)
    $104 * 1.04 = $108.16 (second year and final total)

    there's a formula, but f'd if i remember it. i'm 30 and it's been sometime since college even.
     
  13. Meteorain

    Meteorain Magical & Mystical

    Joined:
    Dec 18, 2003
    Messages:
    17,139
    Likes Received:
    150
    Trophy Points:
    63
    Location:
    London
    Ratings:
    +150 / 0 / -0
    You're not supposed to solve the question. You're supposed to provide a workable equation.

    No marks will be awarded for solving it.
     
  14. Turambar

    Turambar Harebrained Staff Member

    Joined:
    Jan 4, 2004
    Messages:
    7,784
    Likes Received:
    162
    Trophy Points:
    63
    Location:
    Not in Amsterdam :)
    Ratings:
    +189 / 0 / -0
    Interest[$]=(Rate[/year]^Period[year])*Base($)

    Interest = (1.04^2)*100 = $108.16

    components with units between text brackets.

    * for multiplying
    ^ for power

    EDIT: nevermind; I didn't quite see the second page... with the right answers :(
     
  15. Elvenwriter

    Elvenwriter Mmmm, Spam

    Joined:
    Jan 1, 2009
    Messages:
    1,601
    Likes Received:
    30
    Trophy Points:
    0
    Location:
    Disappeared in the Music
    Ratings:
    +30 / 0 / -0
    *head hurts* no!!!! no more math till tomorrow!!
     
  16. Turambar

    Turambar Harebrained Staff Member

    Joined:
    Jan 4, 2004
    Messages:
    7,784
    Likes Received:
    162
    Trophy Points:
    63
    Location:
    Not in Amsterdam :)
    Ratings:
    +189 / 0 / -0
    teeeeehhheeeeee


    Sorrreeeyyyyy :(
     
  17. Elvenwriter

    Elvenwriter Mmmm, Spam

    Joined:
    Jan 1, 2009
    Messages:
    1,601
    Likes Received:
    30
    Trophy Points:
    0
    Location:
    Disappeared in the Music
    Ratings:
    +30 / 0 / -0
    that's okay :)
     
  18. Turambar

    Turambar Harebrained Staff Member

    Joined:
    Jan 4, 2004
    Messages:
    7,784
    Likes Received:
    162
    Trophy Points:
    63
    Location:
    Not in Amsterdam :)
    Ratings:
    +189 / 0 / -0
    Moooooore maaaths!!!!!!


    teeheeeeeeeeee :D

    soo... there's this grocer who's trying to sell his latest batch of 300kg of cucumbers. Admitedly, he's not the sharpest knife in the drawer and displays his latest asset in the blazing sun of a warm day in July.

    Now, the reason it's his pride, the pick of the crop, so to say, is because he knows their water content is 99% - quite the number for a cucumber.

    Sadly, he doesn't sell a single one.

    At the end of the day, he's stuck with the same cucumbers, but now it appears it's water content dropped to 98%.


    Question is: what's the weight of the batch after this hot day in July?