11 divide both sides by -1
Answer: For these 1,151 residents in 2010, we are 95% confident that the average number of days of "not good" mental health is between 3.40 and 4.24 days.
Step-by-step explanation: The survey 95% confidence interval is (3.4,4.24) days in a population of 1,151. What it means is General Social Survey is 95% confident the true mean of days residents are with mental health "not good" is between 3.4 days and 4.24 days.
Answer:

Step-by-step explanation:
The sides of the larger rectangle are 10 cm and 6 cm.
The sides of the part cut out are 3 cm and 2 cm.
The part cut out is attached to one of the sides of the rectangle.
Perimeter of the new shape will be

Perimeter of old shape

Change in the perimeter is 
The perimeter of changed by
.
The answer for 15 is low pollution