Materials have unique properties because each one is made up of different kinds of which particle?

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

Solve the x in the equation x^2+14x+17=-96

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply