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College algebra question. inequalities interval

  1. Sep 29, 2008 #1
    1. The problem statement, all variables and given/known data
    Solve the following inequality and express the solution set in interval notation.


    3. The attempt at a solution

    I got most of the answer right, except the lower interval.

    the answer is:

    ( ??? , 4 )

    the question is find the ???

    it is a negative number like -4x10^8, and I have narrowed it down to somewhere around -3.98558x10^8, but whata ****, how the hell m I supposed to get EXACT number???
  2. jcsd
  3. Sep 29, 2008 #2
    haha nevermind sorry guys, I got the aswer already, it was -7..
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