Answer:
1) B) 123 years
2) B) 51 years 
Step-by-step explanation:
1)given information
2) 2011-1960=51
 
        
                    
             
        
        
        
Okay so rounding to the ten thousand will mean you are looking at the 3 and looking behind it, the 4 is behind the 3 in 34,699 and 0-4 we round down so the nearest 10,000 is 30,000. ANSWER: 30,000
        
             
        
        
        
Answer:
D
Step-by-step explanation:
Because that’s the answer Lol
 
        
             
        
        
        
<span>One pair of metric unit of length would be meters and kilometers. 1 km is equal to 1000 meters. Metric system is the official/standard in measuring length, mass, area, volume, speed, etc. and it is the agreed system of measurement.</span>