Answer:
45×7
Step-by-step explanation:
 
        
             
        
        
        
Looks like you just evaluated the summand for the given value of 

, whereas the question is asking you to find the value of the sum for the first 

 terms.
Let 

. Then 

 is the 

th partial sum.

 happens to be the first term in the series, which is why that box is marked correct:

But the next partial sum is not correct:

and this is not the same notion as the second term (which indeed is 0.75) in the series.
 
        
        
        
8<-5x+20 is one possible answer. it depends on how they are writing it. you need to do the distributed property.
 
        
             
        
        
        
Answer: A. 
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The volume of the shape is 29376
Step-by-step explanation:
You multiply 12 x 17 and get 204 x 12 and get 2448 x 12 and get 29376.