30 mins = 180°
15 mins = 90°
10 mins = 60°
1 min = 6°
hope this helps you
        
                    
             
        
        
        
Answer:
C.
Step-by-step explanation:
its C.
 
        
             
        
        
        
Answer:
The margin of error is of 0.3012, and it means that we should be 99% confident that the population mean would be within 0.3012 of the sample mean.
Step-by-step explanation:
Margin of error

In which  is the standard deviation and n is the size of the sample.
 is the standard deviation and n is the size of the sample.
Standard deviation of 1.3
This means that 
She surveys 124 families
This means that 
Margin of error and meaning:



The margin of error is of 0.3012, and it means that we should be 99% confident that the population mean would be within 0.3012 of the sample mean.