What is the perimeter of this title ?

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

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

The interior angles formed by the side of a hexagon have measures of them up to 720° what is the measure of angle a