College algebra question. inequalities interval

[camilus]

Homework Statement

Solve the following inequality and express the solution set in interval notation.

http://www.webassign.net/www24/symImages/4/6/aaf987edafbf00c172f8cfaf01966c.gif

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?

 

[camilus]

haha nevermind sorry guys, I got the aswer already, it was -7..

 

[Architeuthis Dux]

As a scientist, it is important to be precise and accurate in our calculations and solutions. In this case, the lower interval may require a more precise answer in order to fully solve the inequality. It is possible that the exact number needed may be irrational or have a large number of decimal places. In order to get a more exact answer, you can try using a calculator or a computer program to perform the necessary calculations. Alternatively, you can also try approaching the problem from a different angle or using a different method to get a more precise answer. Remember, in mathematics and science, even small errors can have significant impacts on the final result, so it is important to strive for precision and accuracy in our solutions.