How important is 4 years of math to colleges?

This OP has said in one place that he wants to study biotech engineering. On his chance thread, he has some strong points and some iffy. It’s not a bad idea to look into how to advance his math through 12th grade, rather than insisting BC is good enough. Since it seems he’s mostly looking at UCs, someone who knows those requirements an expectations well can comment. But UCB will be no cakewalk.