Answer:so the answer is 224 dollars
Step-by-step explanation:
30 percent of 320 is about 96 dollars saving 
 
        
                    
             
        
        
        
It's D, 3-2i. 
Hope this helps
        
             
        
        
        
You can prove it by the SAS postulate which should be the first option
        
                    
             
        
        
        
Answer: a) 15, b) 1.
Step-by-step explanation:
A researcher studying public opinion of proposed social security changes obtains a simple random sample of 35 adult Americans and asks them whether or not they support the proposed changes. To say that the distribution of the sample proportion of adults who respond yes, is approximately normal, how many more Americans does the researcher need to sample in the following cases?
(a)    10% of all adult Americans support the changes
Here, 
And , 
So, consider the equality, to find the value of 'n'.

So, there are  more adult Americans needed.
 more adult Americans needed.
(b)   15% of all adult Americans supports the changes
Here, 
So, again we get that 

So, there are  more adult Americans needed.
 more adult Americans needed.
Hence, a) 15, b) 1.
 
        
             
        
        
        
Answer:
D
Explanation:
I'm just typing this part to get to 20 characters