To start class, we went over the quiz we took Wednesday. Number four was found to have a cost of zero when x=80. Therefore, Mr. O'Brien gave the option of making a note on this problem if we got it wrong for this reason, and passing it back in. We then switched gears, and looked at the projects done by our classmates. We then went over the previous night's homework, involving imaginaries. Mr. O'Brien pointed out that with imaginaries there are often multiple ways to solve the problem. This discussion lead us to the fundamental theorum of algebra. Counting multiplicity, every nth degree polynomial has n complex zeros. We were then introduced to the rational roots test. This states: If a polynomial function has rational zeros, then they must be of the for a/b, where a is a factor of the constant term and b is a factor of the leading coefficient.