A dependent variable is something you control, so probably drugs (as the researcher will ensure that they stay drug free)
Depends on where you’re talking about. For example in Europe, Christopher Columbus was funded money after asking Queen Isabella. He told her about all the he would bring back to the country. So using that information, they would most likely request funding from royalty or people of high social classes.
It’s a as they believed that through anything they would get this land such as the trail of tears
The answer is (3a+2b)(a-4c) that’s what I got when I put it in a math calculator