Answer: 20
Step-by-step explanation: since i helped can i have brainlist plesa :D
Answer:

And the best answer on this case would be:
b) m = 4.635
Step-by-step explanation:
Let X the random variable of interest and we know that the confidence interval for the population mean
is given by this formula:

The confidence level on this case is 0.9 and the significance 
The confidence interval calculated on this case is 
The margin of error for this confidence interval is given by:

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

And the best answer on this case would be:
b) m = 4.635
Multiplying a vector by a scalar means to multiply each coordinate of the vector by said scalar.
So, we must multiply both entries by 7:

Notice the pattern of the out bags. For every person after the first, three more bags are pulled. By continuing this pattern you will eventually find the answer
1=2
2=5
3=8
4=11
5=14
6=17
7=20
8=23
9=26
10=29
11=32
Therefore, you need 11 people to get the job done in one day
7, 14 would be it but you have to divide the whole equation by 2 to get the y alone