Answer:

Step-by-step explanation:
Downtown Store North Mall Store
Sample size n 25 20
Sample mean
$9 $8
Sample standard deviation s $2 $1




Standard error of difference of means = 
Standard error of difference of means = 
Standard error of difference of means = 
Degree of freedom = 
Degree of freedom = 
Degree of freedom =36
So, z value at 95% confidence interval and 36 degree of freedom = 2.0280
Confidence interval = 
Confidence interval = 
Confidence interval = 
Hence Option A is true
Confidence interval is 
Basically, the distance of roots to the axis of symmetry are the same to each other. Other root is -5.6. Hope this help.
Package of 5 markers should be $7.50
Unit rate $9.00 ÷ 6 = $1.50
9.00 =
6 5
Answer:
The image is blurry...try fixing it so I can help you.
Answer:
2.77 minutes
Step-by-step explanation:
The cheerleaders can preform for another 2.77 minutes which will end up reaching the maximum allowed time of 6 minutes.