Teachers are being trained to standardize the scores they give to students' essays. The same essay was scored by 10 different teachers at the beginning and at the end of their training. The results are shown in the tables.
Scores for Essay at Beginning of Teachers' Training
75
78
85
79
90
86
85
77
88
77
Scores for Essay at End of Teachers' Training
80
81
83
81
78
84
82
80
78
83
Calculate the MADs for the teachers' scores. Did the teachers make progress in standardizing their scores?
, the MAD before the training was and the MAD at the end of the training is , so was made toward standardizing test scores.

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)

How many and of which kind of roots does the equation f(x)=x3−x2−x+1