A student scored in the 60th percentile on her math exam. What does this student's score mean in relation to those of the other
test takers? (4 points) a Her score was worse than those of 60% of all test takers. b Her score on the exam was 60%. c Her score was better than those of 60% of all test takers. d Her score was in the top 60% of all test takers' scores. PLEASE HELP!!
c. Her score was better than those of 60% of all test takers
Step-by-step explanation:
Percentile Score is the score of an exam or test candidate with regard to the relative performance of the other persons that took part in the exam or test.
The percentile score is calculated by converting candidates scores into a scale consisting of the scores of all candidates and ranging from 0 to 100
A 60th percentile score means that the student performed better than 60% of all the candidates of the test and 40% of the test takers scored the same as or better than the student.
We know that sin²x+cos²x=1 so clear cos x cos x=(+/-)√[1-sin²x]
in this problem <span>Angle 0 is in quadrant 1 -----> cos o and sin o are positive </span>sin o=2/5 cos x=√[1-(2/5)²]----> cos o=√[1-4/25]----> cos o=√[21/25]---> cos o=√21/5
