State law is what determines when and how breaks are to be taken. In most states, there is no law that requires an employer to give their employee breaks, let alone pay for them. In my experience, I've had mostly unpaid break times while an hourly employee.

So it's common to earn 8 hours pay working 8-5, with two 15 minute "cigarette" breaks and a 30 minute lunch break.

Typically a 35 hour workweek is 7 hour days with up to an hour of unpaid lunch.