Results 1 to 2 of 2

Math Help - Linear Modeling Help

  1. #1
    Junior Member
    Joined
    Sep 2008
    Posts
    29

    Linear Modeling Help

    I have 2 problems that i have worked out, but i would like to know if i worked them correctly.

    Problem 1.) Initially, 100 milligrams of a radioactive substance was present. After 6 hours, the mass decreased by 3%. If the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours.

    For this problem i calculated that after 24 hours there will be 88.529g present.
    Is this Correct?

    Problem 2.) A small metal bar, whose initial temperature was 20 degrees C, is dropped into a large container of boiling water (100 degrees C). How long will it take or the bar to reach 90 degrees C if it is known that after 1 second the temperature increased by 2 degrees C?

    For this problem I calculated that it will take 82.1335 seconds for the bar to reach 90 degrees C.

    Is this Correct?

    Thank You,
    Diggidy
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Sep 2008
    Posts
    29
    Can somone please tell me if these are correct?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. linear modeling
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: March 4th 2011, 04:21 PM
  2. Replies: 0
    Last Post: September 26th 2010, 04:33 PM
  3. Linear programming - modeling a problem
    Posted in the Business Math Forum
    Replies: 3
    Last Post: September 26th 2010, 12:43 AM
  4. Linear programming modeling problem
    Posted in the Business Math Forum
    Replies: 0
    Last Post: September 19th 2010, 04:45 PM
  5. [SOLVED] linear regression modeling HELP
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: March 21st 2006, 01:03 PM

Search Tags


/mathhelpforum @mathhelpforum