Hello again. I'm having more trouble with my homewrork, but this one really isn't fair. We haven't done the work in class, and as far as I can tell it isn't on the syllabus, but we're still expected to do it. 1. The problem statement, all variables and given/known data http://img17.imageshack.us/img17/4379/questions7.jpg [Broken] 2. Relevant equations http://img23.imageshack.us/img23/122/equation7.jpg [Broken] 3. The attempt at a solution http://img219.imageshack.us/img219/9325/attempt7a.jpg [Broken]http://img23.imageshack.us/img23/4422/attempt7b.jpg [Broken]http://img23.imageshack.us/img23/7175/attempt7c.jpg [Broken] For part c, I have no idea where to go. From the googling I've done, I'm supposed to find a value of x where f(x)=0. I would have thought that the point of part b was to get a value of of x to make f(x)=0, so the trial-and-error bit would be removed. I used some software called Mathematica to plot the graph of this function between x=-4 and 4, and the only point where it crosses the x-axis is somewhere between x=2.3 and 2.4. I plotted between those points because later on I have to sketch the graph and plot the points when x=0 to x=3, and only those points. I originally made a mistake where I have -250 - 16. I added 16 and got -234, then came up with this : http://img23.imageshack.us/img23/5506/wrongh.jpg [Broken] This is my third day on this question, and it's driving me nuts. Does anyone have any hints/tips or know what I'm supposed to do?