Answer:
standard error of the mean = 1.6960
Step-by-step explanation:
Given -
Mean
= 53 minutes
Standard deviation ( s ) = 53.9 minutes
n = 1010
standard error of the mean =
=
= 
= 1.6960
Answer would be 70m squared
30 is the value of x given of above quertion
If we don't count the letters,

The answer would be: 4 3/8! Hope this helped! Brainliest is always appreciated!
Answer:
it might be the second one not sure