Angle x is a third quadrant angle such that cos x = -1/5.

What is the exact value of cos (x/2)?

Enter your answer, in simplest radical form, in the box.

cos (x/2) = ___

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

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

A.s.a.! this is a similarity in right triangles. next (solve for x)a.) 12b.) 5c.) 12.5d.) [tex] 6\sqrt{3} [/tex]