Actually, it's three different state measures, and each state has different rules about what the election results mean. In Oregon, the measure is now law, and the state government is now tasked with figuring out how to carry out the law. They have to come up with regulatory bureaus, figure out who will collect the taxes (likely the Oregon Liquor Control Commission), come up with licensing rules for new shops, make time for new shops to be licensed, instruct police on the changes to criminal code (e.g. you can smoke in private but not in public, you can only have so much weed, you can only have so many plants), and so on.

Alaska has different rules. So does DC.

Also, there's a complicating factor in that marijuana is still illegal. State law might say it's okay, but Federal law says it's still an illegal narcotic. A US Attorney with their head up their asses can prosecute every weed shop and weed grower in each of these states; even worse, they can seize all these shops' assets and the assets of all the people owning or employed by those shops, and sell those assets prior to trial. If you ask me, the Democrats have a winning issue in 2016 (or 2018, which would be a harder cycle for them) if they run on allowing states to make their own decisions about marijuana.

Hope this helps.

Also, never be afraid to learn your math in a physics course. It's the best way.

That kinda depends...I found it was easier just taking more math courses than trying to figure out what the hell my EM professor was doing. Eventually I just switched majors to Math.

...double major in something useful and something useless.

I majored in math and computer science. I have a friend who went back to school in her 30s. Her majors are German and Philosophy. She's already getting translation work a year before graduation.