Sample Chapters

I read that you should send somewhere around 30 pages or so, I may be wrong though.

Most of those say not more than 50 pages. This is a question that is asked a lot - I would err on sending less. They can tell from that very first page whether it's a yes - read more or - reject.
My full requests always came from sending an equery with the first 5 pages pasted at the bottom. My agent said reading those first 5 pages prompted her assistant to bypass the partial and ask for the full. Find a place where you think a reader would like to see more.
Sending too much is not always a good thing.

I agree with Orion. A writer should be able to hook the agent on the first page. For an agent to get a feel for the writing style (and whether or not the person can write), it's apparent within the first five pages.

send 10-50 pages and explain why its one big long chapter and please format it correctly

Sage advice, Aghast. Me thinks youse an agent...