Answer:
there isn;t anything posted underneath
Step-by-step explanation:
 
        
                    
             
        
        
        
S = 60W + 650 <== ur equation
after 18 weeks...so sub in 18 for W
S = 60(18) + 650
S = 1080 + 650
S = 1730 <==
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
we know that
The simple interest formula is equal to
 
where
I is the Final Interest Value
P is the Principal amount of money to be invested
r is the rate of interest  
t is Number of Time Periods
in this problem we have
 
substitute in the formula above
 
solve for r
 

convert to percentage (multiply by 100)
