Answer:
a) 9.135
b) 392.79
Step-by-step explanation:
Hope my answers are helpful
 
        
                    
             
        
        
        
Answer:
1372.16
Step-by-step explanation:
If I am not mistaken, the answer is just 1.34*1024, which is 1372.16. Also, I assume that "moles" mean molecules.
 
        
             
        
        
        
Answer:
2 units
Step-by-step explanation:
The length of VW is just the distance between the two coordinates. You could use the distance formula, or an easier and faster way would be to recognize that since both points have the same y-coordinate, the distance between them will just be the distance of the x-coordinates. The absolute value of -4 and -2 is 2, so the length of VW is 2 units.
Hope this helped! ;)
 
        
             
        
        
        
Here's a pattern to consider:
1+100=101
2+99=101
3+98=101
4+97=101
5+96=101
..... 
This question relates to the discovery of Gauss, a mathematician. He found out that if you split 100 from 1-50 and 51-100, you could add them from each end to get a sum of 101. As there are 50 sets of addition, then the total is 50×101=5050
So, the sum of the first 100 positive integers is 5050.
Quick note
We can use a formula to find out the sum of an arithmetic series:

Where s is the sum of the series and n is the number of terms in the series. It works for the above problem.