Results 1 to 3 of 3

Math Help - Help thease problems problems

  1. #1
    Member
    Joined
    Jan 2008
    Posts
    173

    Help thease problems problems

    1) m : n = 1 : 4, n : p = 4 : 5. If p =1000, find m.

    2) The circumference of a circle is 1, find the central angle corresponding to the arc which 2/5 long
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Forum Admin topsquark's Avatar
    Joined
    Jan 2006
    From
    Wellsville, NY
    Posts
    9,675
    Thanks
    302
    Awards
    1
    Quote Originally Posted by sri340 View Post
    1) m : n = 1 : 4, n : p = 4 : 5. If p =1000, find m.
    n: p = 4:5

    so
    5n = 4p = 4(1000) = 4000

    thus
    n = 800

    Again
    m:n = 1:4

    so
    4m = n = 800

    thus
    m = 200

    -Dan
    Follow Math Help Forum on Facebook and Google+

  3. #3
    is up to his old tricks again! Jhevon's Avatar
    Joined
    Feb 2007
    From
    New York, USA
    Posts
    11,663
    Thanks
    3
    Quote Originally Posted by sri340 View Post
    1) m : n = 1 : 4, n : p = 4 : 5. If p =1000, find m.
    you have \frac mn = \frac 14 \implies n = \frac 1{4m}

    you also have \frac np = \frac 45 \implies n = \frac 4{5p}

    but we found that n = \frac 1{4m}

    thus, \frac 1{4m} = \frac 4{5p}

    \Rightarrow m = \frac {5p}{16}

    now continue

    2) The circumference of a circle is 1, find the central angle corresponding to the arc which 2/5 long
    do you work in radians or degrees?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 3
    Last Post: October 3rd 2011, 05:35 AM
  2. binomial problems/normal problems
    Posted in the Statistics Forum
    Replies: 1
    Last Post: October 19th 2010, 11:46 PM
  3. binomial problems as normal problems
    Posted in the Statistics Forum
    Replies: 1
    Last Post: October 19th 2010, 11:41 PM
  4. Problems with integration word problems
    Posted in the Calculus Forum
    Replies: 5
    Last Post: April 25th 2010, 05:39 PM
  5. please help with thease DEs
    Posted in the Differential Equations Forum
    Replies: 4
    Last Post: April 9th 2010, 01:37 AM

Search Tags


/mathhelpforum @mathhelpforum