10m3 of air weigh 13 kg. the weight of air is directly proportional to its volume. find the constant of variation; it is called density

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

When y’all answer can y’all explain too !