Let u = [2,2,0], v = [0,2,0]. Find the angle θ between the vectors u and v

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?