Given f(x)=x^3+9x+kf(x)=x 3 +9x+k, and x-1x−1 is a factor of f(x)f(x), then what is the value of kk?

Given a normal distribution with µ =50 and σ =4, what is the probability that 5% of the values are less than what x values? between what two x values (symmetrically distributed around the mean) are 95 % of the values? instructions: show all your work as to how you have reached your answer. don’t simply state the results. show graphs where necessary.