the mean of normally distributived test scores is 81 and the standard deviation is 3. if there are 172 test scores in the data sample, how many of them were in the 81 to 87 range

Ms. sutton recorded the word counts and scores of the top ten essays in a timed writing contest. the table shows her data. how does the word count of an essay relate to its score in the contest? word count tends to decrease as the score decreases. word count tends to increase as the score decreases. word count tends to remain constant as the score decreases. word count has no apparent relationship to the score of the essay.

In the triangles, tr = ge and sr = fe. if = 3.2 ft, which is a possible measure of ? 1.6 ft 3.0 ft 3.2 ft 4.0 ft

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?