Yes I think I understand it now. I'm pretty sure I can finish it up now, if I get stuck I will come back here tomorrow. Thank you so much for your help, you have no idea how much this means to me!
Thank you very much, I think I am on the right track now. I solved for Volume and came up with an answer of 1.7x10^6 m^3. Using that Volume, I then solved for the Total Mass of the pyramid, which came out to be 4.2x10^9 kg.
Now, I am still confused as to what to do next. I know that...
Ok so I can calculate dm then. dm=25000*(length*base*height of square) = 2500*48400 dy = 121000000 dy. Am I on the right track there? And then I would use that formula for Ycom to find the y component of the center of gravity? So Ycom = (1/Mtotal)*integral of y*121000000 dy from y=0 to y=104...