I've done whatever I could to find this answer but it still says I'm incorrect. I've done the r² × pie × h and I still get it incorrect ​

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).

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.

What is the value of x enter your answer in the box (3x+50