Can you please explain this for my study guide.

Semester 2 Final Review 1. Given the following functions find each new function. f (x) = 5x3 +2x2 - 3x +5 g(x) = -2x3 +6x2+ 2x-11 h(x) = 2x2 k(x) = 5x - 1 p(x) = Vx+3 3 r (x) = _ x - 2 a) (f - g) (x) b ) (f * h) (x ) c) h(p(x) ) d) p(h(x)) e) h(k(x) ) f) r(h(x)) 2. f (x) = 32x-5 g (x) = 3-x+2 Find (f * g) (x) 3. Graph y = [sinx] - 4 4. A math test has scores that are distributed normally with a mean of 77% and a sta deviation of 6. a. What is the probability a student scores between 71% and 83%? b. What is the probability a student scores above 83%? c. What is the probability a student scores less than a 65%