Using the numbers 2,0,1,9 in order what exoression do you make to equal 6

Sketch one cycle if the cosine function y=2cos2theta

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.