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Type: Posts; User: iamthetman

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  1. Don't ask the same question twice.

    Don't ask the same question twice.
  2. So you need to pick 2 numbers since that is your...

    So you need to pick 2 numbers since that is your sample size. On your first pick, you can select 1, 3 or 5. Then on your second pick you can still select 1, 3 or 5 since it says 'with replacement'....
  3. Answers
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    Precision is defined as: The ability of a...

    Precision is defined as: The ability of a measurement to be consistently reproduced.

    Example: I can throw a dart at the dartboard and hit a triple 20 every time even though I'm trying to hit the...
  4. Question: Stoichiometry

    by iamthetman
    Answers
    3
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    1,032

    Well to start with, think about how many cookies...

    Well to start with, think about how many cookies you could get if you had only 1000 cups of flour and an infinite amount of every other supply. That would mean you could make 1000/2.25 batches of...
  5. Try multiplying the entire second equation by -3...

    Try multiplying the entire second equation by -3 and then add the two equations together. You'll notice that you've "eliminated" the 'x' terms.
  6. Answers
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    You have the null hypothesis and the maximum...

    You have the null hypothesis and the maximum allowable error mixed up in the top section.
  7. Question: Finding Slope

    by iamthetman
    Answers
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    829

    Try drawing the line on a graph first. You'll...

    Try drawing the line on a graph first.

    You'll notice that it's a straight horizontal line.

    Since slope is rise over run and there is no rise the slope is zero.
  8. Answers
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    1,439

    I guess the due date for the homework has passed...

    I guess the due date for the homework has passed so it's no use for PAK anymore...
  9. Answers
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    695

    I appreciate your work galactus.

    I appreciate your work galactus.
  10. Question: Geometric Mean

    by iamthetman
    Answers
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    936

    So there's 8 years of increase. You start with...

    So there's 8 years of increase. You start with 14,968,000 and end with 66,290,000.

    The compounded increase per year would be:

    14,968,000 * (1 + rate increase per year)^8 = 66,290,000

    Then...
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    4,989

    Elimination: Multiply the entire second...

    Elimination:

    Multiply the entire second equation by -1 to get: 10x + 2y = -8

    Now add equation one and the new equation two together to get:
    13x = -6 -> x = -6/13
    Throw x back into one of the...
  12. Answers
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    4,989

    Substitution: Rearrange first equation: 3x - 2...

    Substitution:

    Rearrange first equation: 3x - 2 = 2y
    Then substitute into second equation: -10x - (3x - 2) = 8
    Then group like terms and solve: -13x = 6 -> x = -6/13
    Throw x back into one of the...
  13. Answers
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    965

    So much for not spoon feeding the answer to him...

    So much for not spoon feeding the answer to him...
  14. Answers
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    965

    If you know how to do one then you should know...

    If you know how to do one then you should know how to do the other.
    Here's what you would do for the first one:

    let x be the length of the rectangle.
    let y be the width of the rectangle.

    So...
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    1,192

    The sample data are identical in sample number 5...

    The sample data are identical in sample number 5 since there is no range.
  16. Junk food?

    Junk food?
  17. Question: Mothers' Day

    by iamthetman
    Answers
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    979

    Cook it on a lower temperature and don't cook it...

    Cook it on a lower temperature and don't cook it for too long!
  18. Answers
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    1,054

    Now that you've fixed part 3 and you have the...

    Now that you've fixed part 3 and you have the solutions to the other questions, you should be able to solve part 3 on your own... considering this is your take home final.
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    876

    I thought so.

    I thought so.
  20. Question: Present value

    by iamthetman
    Answers
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    1,034

    Here's how to solve: You have to discount all...

    Here's how to solve:

    You have to discount all future cashflows back to the present value.

    So PV of the $2 dividend at the end of the first year is 2/(1+11%).
    PV of the $2.20 dividend at the...
  21. Answers
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    876

    I agree with the horizontal component. The...

    I agree with the horizontal component.

    The vertical component would be 140sin(35).
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    y = -x^2 + 8x - 12 -y = x^2 - 8x + 12 -y = (x^2...

    y = -x^2 + 8x - 12
    -y = x^2 - 8x + 12
    -y = (x^2 - 8x +16) + 12 - 16
    -y = (x-4)^2 - 4
    y = -(x-4)^2 + 4
  23. Answers
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    1,007

    For the question about the class picture: ...

    For the question about the class picture:

    First think about how just the girls can be arranged. You should be able to write all the different possibilities. You'll find that there are 4! Ways of...
  24. Answers
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    1,007

    The second is extremely simple if you understand...

    The second is extremely simple if you understand the answer to the lottery question you asked. You have 10 people from which you can selecct and you must select 3 members. 10 choose 3.
  25. Answers
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    Have you attempted these questions on your own...

    Have you attempted these questions on your own first?
    You won't learn much unless you've thought about these before asking us.
  26. Answers
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    So essentially what you have is this: x=3 ->...

    So essentially what you have is this:
    x=3 -> y=-2
    x=2 -> y=-1
    x=1 -> y=0
    x=0 -> y=1
    x=-1 -> y=2
    x=-2 -> y=3
    but then when you get to x=-3 you notice a change:
    x=-3 -> y=2
    x=-4 -> y=1
  27. Answers
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    1,558

    Grand prize: 1 / 40 choose 6 for one set of six...

    Grand prize: 1 / 40 choose 6 for one set of six numbers so 2*(1 / 40 choose 6) since you get to select two sets of six numbers with one entry.


    No winning Numbers: 34 choose 6/ 40 choose 6 for...
  28. Answers
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    8,078

    Plot the points on a graph. x=3 -> y=-2 x=2 ->...

    Plot the points on a graph.
    x=3 -> y=-2
    x=2 -> y=-1
    x=1 -> y=0
    x=0 -> y=1
    x=-1 -> y=2
    x=-2 -> y=3
    x=-3 -> y=4

    You'll notice that you have a straight line!
  29. Answers
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    Al2S3 + 6H2O = 2AL(OH)3 + 3H2S

    Al2S3 + 6H2O = 2AL(OH)3 + 3H2S
  30. Actually this is a case for conditional...

    Actually this is a case for conditional probability.

    Here's how you solve conditional probabilities:
    P(A) = P(A|B)xP(B)

    P(getting ace from 50 cards) = P(getting ace from 50 cards|4 aces...
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    You have a v in the denominator so start by...

    You have a v in the denominator so start by multiplying everything through by (v+2). Then expand and group all the like terms. Then use the quadratic formula to solve for the values of v!
  32. Answers
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    To determine whether it's unusual, look at how...

    To determine whether it's unusual, look at how many people have it vs. how many people you would expect to have it.

    For A: 5 people actually have that blood type
    You'd expect 45 x 6% of people to...
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    For what type of shape?

    For what type of shape?
  34. x = (y+1)^2 + 3

    x = (y+1)^2 + 3
  35. Answers
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    Think about why your ears pop sometimes!

    Think about why your ears pop sometimes!
  36. Answers
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    Your ellipse looks perfect. The next step might...

    Your ellipse looks perfect. The next step might be to graph it.

    Your hyperbola has a mistake in it. Going from line 1 to line 2 you forgot to change -54x to +54x since you factored out the...
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    1,245

    Well, the standard form for the equation of a...

    Well, the standard form for the equation of a circle is x^2 + y^2 = r^2 where the centre of the circle is (0,0) so putting your equation into this format would give you the answer to both your...
  38. Answers
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    There is a homework section for homework help....

    There is a homework section for homework help. Key word being 'help'.

    The point is for you to learn, not to copy some answer you get off the internet.
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    y=4x-3

    y=4x-3
  40. Answers
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    If a lottery ticket gives 1:99 odds, what is the...

    If a lottery ticket gives 1:99 odds, what is the probability of drawing two winning tickets

    Well the probability of drawing one winning ticket is 1/100 so the probability of drawing two would be...
  41. Question: 3rd grade math

    by iamthetman
    Answers
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    1,538

    8+1+3=14 1+3+8=14 3+8+1=14 8+(1+3)=14...

    8+1+3=14
    1+3+8=14
    3+8+1=14

    8+(1+3)=14
    (8+1)+3=14
    1+(3+8)=14
    (1+3)+8=14
    3+(8+1)=14
    (3+8)+1=14
  42. Answers
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    I believe there are many possible solutions to...

    I believe there are many possible solutions to this.

    One possible solution would be f(x) = x + 13 * (100-x)/38 although lower orignal scores like 20% change more drasticaly than higher original...
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    Actually, if you take a piece of paper and double...

    Actually, if you take a piece of paper and double the length and height of the paper, you get a sheet of paper that is 4 times the size. This would mean that the full pack weighs 40 lbs.
  44. Question: Story suit ?

    by iamthetman
    Answers
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    915

    Well if he sold 4/5 of them, he has to have 1/5...

    Well if he sold 4/5 of them, he has to have 1/5 left right...

    So what's 1/5 x 225
  45. Question: Story ?

    by iamthetman
    Answers
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    861

    What's four-fifths of the 45 gallons that you...

    What's four-fifths of the 45 gallons that you have?
  46. Answers
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    1,150

    Let's look at just the ways of selecting 3...

    Let's look at just the ways of selecting 3 jacks...

    Jack of Hearts, Jack of Spades, Jack of Diamonds
    Jack of Hearts, Jack of Spades, Jack of Clubs
    Jack of Hearts, Jack of Diamonds, Jack of...
  47. Answers
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    877

    Nice!

    Nice!
  48. Answers
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    Binomial Distribution -- from Wolfram MathWorld...

    Binomial Distribution -- from Wolfram MathWorld
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    That would be my guess at the second one. 2K +...

    That would be my guess at the second one.

    2K + 2H2O -> 2kOH + H2

    Please note that we don't do homework for you on this site.
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    Haven't done this in a while but I think the...

    Haven't done this in a while but I think the first one is:
    N2 + 3H2 -> 2NH3

    Second one is probably:
    2KClO3 -> 2KCl + 3O2

    Third is probably:
    2NaCl + 2F -> 2NaF + Cl2

    Fourth is probably:
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