The number 20 is decreased to 19. What is the percentage by which the number was decreased, to the nearest tenth of a percent

6x - 8 = 16 solve the following equation. then place the correct number in the box provided.

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).

Plz hurry evaluate the expression a+b where a=8 and b=19