21 A drone's descent from high above the school was recorded by students in the robotics class. The graph shows
the height of the drone after x seconds of descent.
y Drone Flight
60
55
50
45
40
Height of Drone (feet)
35
30
25
20
I
15
10
5
0
6 12 18 24 30 36 42 48
Time (sec)
A
B
What is the range of the function for this situation?
All real number less than or equal to 39.
All real numbers less than or equal to 55.
All real numbers greater than or equal to 0 and less than or equal to 39.
All real numbers greater than or equal to 0 and less than or equal to 55.
С
D
M

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: minus2.00, minus1.00, 0, 1.00, 2.00? why? a. the z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. b. the z score of 0 is most preferable because it corresponds to a test score equal to the mean. c. the z score of minus2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. d. the z score of minus1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average