A successful basketball player has a height of 6 feet 3 inches or 191cm. Based on his statistics from a data set, his height converts to the z score of 2.31. How many standard deviations is his height above the mean? (round 2 decimal points as needed)

Given that (x-3) is a factor of f(x)=x^3+ax^2-x-6, find a and hence the number of real roots or the equation f(x)=0

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.

Find the solution of this system of equation -7x+y=-20 9x-3y=36