Answer:
Option B) 9.1
Step-by-step explanation:
We are given the following in the question:
Average score = 490.4
Standard deviation = 63.7
Sample size, n = 49
Formula:

Putting values, we get,
Standard error =

Thus, the correct answer is
Option B) 9.1
Answer: y= 3x
Step-by-step explanation:
1. The question lack info
Shape 3 because if you look at the shaded figure it is a square like shape i hope it helps!!!
Answer:
Mean temperature for the first 8 days was 
Step-by-step explanation:
Mean = 

Best Regards!
Answer:
60
Step-by-step explanation:
420 divided by 7