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
133.857142857 I’m not completely sure
No sé, prueba 2,3,5,7,11,13....
Hay muchos números primos!
When the slopes of two lines are equal,they are parallel.

so the equation of the parallel line to this one is :

hope this helps