Answer:
90
Step-by-step explanation:
To find s4  we find sum of values when n=1,n=2,n=3,n=4
given expression is 
n=1 , plug in 1 for n

n=2

n=3

n=4

Sum of all 4 terms = 6+12+24+48=90
 
        
             
        
        
        
Answer:
There is no slope
Step-by-step explanation:
When finding the slope both numbers have to be positive without positive numbers you will not have a positive slope there fore no slope
 
        
             
        
        
        
The answer is 28.09 g. I hope this helped.