Consider ABC XYZ what is the value of tan a

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

Which expression is equivalent to sq-80

Which graph represents the parent function of y=(x+2)(x-2)