Which property is represented by this numerical expression?
(6 + 11) + 23 = 23 + (6 + 11).

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

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).