You can use the formula a=h/h to find the batting average a of a batter who has h hits of .290 and has been at bat 300 times, how many hits does the batter have?

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).

Can someone, me with this.i really need with this

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me