Results 1 to 3 of 3

Math Help - Modelling with quadratic equation.

  1. #1
    Newbie
    Joined
    Feb 2010
    Posts
    10

    Exclamation Modelling with quadratic equation.

    The approximate number of accidents in one month,N, involving drivers between 16 and 30 years of age inclusive can be approximated by the equation or function N(a) = 2a squared - 80a + 500 where a = age of driver.

    Calculate N(20) and explain what it means.

    What's the domain of the function?

    Can it be used to calculate the aprrox number of accidents for people 65 yrs of age?


    I'm so lost. Please help me understand. Thanks
    Last edited by mr fantastic; February 23rd 2010 at 11:47 PM. Reason: Changed post title
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Apr 2005
    Posts
    16,232
    Thanks
    1795
    Quote Originally Posted by brianfisher1208 View Post
    The approximate number of accidents in one month,N, involving drivers between 16 and 30 years of age inclusive can be approximated by the equation or function N(a) = 2a(2 to the 10th power) - 80a + 500 where a = age of driver.

    Calculate N(20) and explain what it means.
    What you have written really makes no sense. If you really mean "(2 to the 10th power)", that is just 2^{10}= 1024 so this could be more easily written "N(a)= 2048a- 80a+ 500= 1968a".

    Did you mean a to the 10th power? Then it's just arithmetic: If
    N(a)= 2a^{10}- 80a+ 500
    , then N(20)= 2(20^{10})- 80(20)+ 500.

    What's the domain of the function?
    The problem says "where a= age of driver" and "drivers between 16 and 30 years of age".

    Can it be used to calculate the aprrox number of accidents for people 65 yrs of age?
    The problem says "drivers between 16 and 30 years of age".


    I'm so lost. Please help me understand. Thanks
    You seem to have difficulty reading the problem.
    Last edited by mr fantastic; February 23rd 2010 at 11:47 PM.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Feb 2010
    Posts
    10
    Thank you for your reply...but I seem to have made a mistake in the equation. It is 2a squared.
    Last edited by mr fantastic; February 23rd 2010 at 11:43 PM.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Modelling a quadratic equation.
    Posted in the Calculus Forum
    Replies: 3
    Last Post: August 5th 2010, 12:43 AM
  2. Modelling a quadratic - Systems of linear equations
    Posted in the Pre-Calculus Forum
    Replies: 30
    Last Post: May 12th 2010, 06:13 AM
  3. Quadratic Modelling
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: November 7th 2009, 03:53 AM
  4. Quadratic Modelling Help
    Posted in the Algebra Forum
    Replies: 3
    Last Post: April 26th 2009, 05:17 AM
  5. Quadratic Modelling
    Posted in the Algebra Forum
    Replies: 3
    Last Post: February 18th 2008, 04:00 AM

Search Tags


/mathhelpforum @mathhelpforum