Answer:

Step-by-step explanation:
As the mean is 20.2 and the standard deviation is 2.4
The range within the first standard deviation is
(17.8,22.6)
This means that we can safely use the range of (18,22) as we cannot confirm whether the other values fall within the range.
Within this range there are

Answer:
dark spiders clowns and falling
Step-by-step explanation:
Answer:
25
Step-by-step explanation:
The students on the screen is the difference between the total number of students she zoomed and the students in the waiting area
37 - 12 = 25
Answer:
x=4
Step-by-step explanation:
The question shows an isoceles triangle, which means both sides should equal:
28=9x-8
36=9x
x=4