What do i have to get on my term final?

ok.....I want to know how many questions out of the 115 point final i have to get right in order to get an A...It is my based on percentage so my in cl work is worth 40% of my grade and my test are worth 50% of my grade leaving my final only being 10%....currently i have 99.49% on my in cl work, and 89.71% in tests and quizes. I just wnat to know how many questions i have to get right in order to p this cl with a 90%..nothing below