Urgent plz answer this u will get 10 points

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 each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

Find the interior angle of a regular polygon which has 6 sides