Results 1 to 6 of 6

Math Help - Couple questions

  1. #1
    Newbie
    Joined
    Jan 2013
    From
    arizona
    Posts
    3

    Couple questions

    Can you guys help me workout these problems for my HW due tonight - sooner the better please

    1. 1.431^9t = 3

    2. At sea level, the weight of the atmosphereexerts a pressure of 14.7 pounds per square inch, commonly reffered to as 1 atmoshphere of pressure. As an object descends in water, the pressure P ad depth d are linearly related. In sal water, the pressure at a depth of 33 ft is 2 atms, or 29.4 pounds per square inch.

    A) What is the correct linear model?
    P = ?d + ?
    B) What is the pressure at a depth of 50 ft
    C) What is the depth at which the pressure is 5 atms?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,887
    Thanks
    326
    Awards
    1

    Re: Couple questions

    It is against MHF policy to either help or solve problems for class credit. Please do not do this again.

    -Dan
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2013
    From
    arizona
    Posts
    3

    Re: Couple questions

    Quote Originally Posted by topsquark View Post
    It is against MHF policy to either help or solve problems for class credit. Please do not do this again.

    -Dan
    Actually i read the policy and all the numbers above are completely scewed... I am giving random numbers and just need help with the formula.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,887
    Thanks
    326
    Awards
    1

    Re: Couple questions

    All right. Let's play the Socrates game.

    Show us what you've been able to do on each problem, starting with the first one. But don't expect any direct answers...

    -Dan
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Jan 2013
    From
    arizona
    Posts
    3

    Re: Couple questions

    Quote Originally Posted by topsquark View Post
    All right. Let's play the Socrates game.

    Show us what you've been able to do on each problem, starting with the first one. But don't expect any direct answers...

    -Dan
    Ok soo... I was given an example to go off of for the class on number 1... it was this: 6^2x-x^2 = 6^-8... So i took away 6 on either side... I was left with 2x-x^2=-8... Then i did +8 to make the equation equal to zero... Then i got 2x-x^+8=0.. Then I got my answer of x = -2 and x = 4... I get that... But i dont get what you do when you have unequal numbers on either end...

    The second one... I am not sure whether its P = .445d + 14.7 OR P = .445d + 29.4

    Trust me... I am not a moron to post on here the actual questions... And no reason to give me a warning as I know what I am doing..
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,887
    Thanks
    326
    Awards
    1

    Re: Couple questions

    Quote Originally Posted by Bosanac View Post
    Ok soo... I was given an example to go off of for the class on number 1... it was this: 6^2x-x^2 = 6^-8... So i took away 6 on either side... I was left with 2x-x^2=-8... Then i did +8 to make the equation equal to zero... Then i got 2x-x^+8=0.. Then I got my answer of x = -2 and x = 4... I get that... But i dont get what you do when you have unequal numbers on either end...
    If I'm correct, what you are saying you've done is this:
    6^2 \cdot x - x^2 = 6^{-8}

    This looks a tad funny, but let's go with what it looks like and continue:
    Your next step says: "So i took away 6 on either side" which would give:
    6^2 \cdot x - x^2  - 6 =  6^{-8} - 6

    And your next line is incorrect.

    What I would do is to expand the original, giving
    6^2 \cdot x - x^2 = 6^{-8}

    36x - x^2 = \frac{1}{6^8}

    36x - x^2 = \frac{1}{1679616}

    Not the result you seem to be working with. Let's validate this stage before we do any more on it.

    Quote Originally Posted by Bosanac View Post
    Trust me... I am not a moron to post on here the actual questions... And no reason to give me a warning as I know what I am doing..
    I never start with the assumption that anyone is a moron. But we are not a homework solving help site. We absolutely cannot tolerate doing someone's homework and the loss of reputation that this site has been able to garner. That would be the end of any credibility of this site. I am reeeealy stretching it by even making comments about your work. I will allow indirect help on these problems, but only this once.

    -Dan
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Need help on a couple of questions!
    Posted in the Statistics Forum
    Replies: 3
    Last Post: November 9th 2010, 10:42 PM
  2. [SOLVED] A couple questions...Help please.
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: July 24th 2010, 05:05 PM
  3. A couple of questions
    Posted in the Advanced Algebra Forum
    Replies: 11
    Last Post: March 1st 2010, 08:29 PM
  4. couple of questions...
    Posted in the Algebra Forum
    Replies: 3
    Last Post: February 28th 2010, 02:38 PM
  5. a couple of questions...thanks
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: April 12th 2008, 08:18 PM

Search Tags


/mathhelpforum @mathhelpforum