I was a math major, graduated in May, and I'll straight tell you that Kramer is not a good professor. RMP has him dead pegged.
However, Business Calc is basically pre-calc from H.S., so if you did fine there, you'll do just fine in the class. Just read the book as well as going to class because that's what Kramer assumes you'll be doing without ever saying it publicly.
Also, use the Math help room, 396 Carver Hall. There's always a junior or senior math major that's in there with the sole purpose of helping someone who has questions out. Believe me, you'll get help because there was maybe one or two people that came in asking for help when I worked in there.