Help me please
cant tell which of the rest is right or not

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

If the value of cos330°is√3/2 then find cos 165°.