The answers to the first two systems of equations
 
        
        
        
Hi, thank you for posting your question here at Brainly.
Simply substitute the value of the intensity to the variable i. Taking its logarithm to the base 10, the answer would be 7.8. Hence, 6 million ergs is equivalent to 7.8 based on the Richter scale.
        
                    
             
        
        
        
Answer:
Inflation can be “demand-pull” or “cost-push.” Demand-pull is “good” inflation, the kind of inflation the Fed is trying (and mostly failing) to generate. This is inflation that is caused by rising demand.
Step-by-step explanation:
 
        
                    
             
        
        
        
A) 21 (21 - 1 = 20)
B) 75 (8 x 15 = 120; 120 - 3 - 10 - 8 - 3 - 10 - 1 - 10 = 75)
C) 6 (any value close to the mean)
        
             
        
        
        
Answer:
351 m^2 
btw
#1= 448 cm^2
#2=209pi cm^2
#3=351 m^2 
and that's all I know hope it really helps we all need it sometimes (;