To find the significant figure you must start from the left.
If you see a 0 then you mustn’t count it and look at the next number.
In this case we have a 9 as the first digit on the left.
We are rounding to 1 significant figure so our answer would be 100000.
Hope this helped!
        
             
        
        
        
Answer:
Step-by-step explanation:

 
        
             
        
        
        
Answer:
39
Step-by-step explanation:
4x+7=9x-33
4x-9x=-33-7
-5x=-40
x=8
4×8+7=39
 
        
                    
             
        
        
        
See https://web2.0calc.com/questions/i-don-t-understand_15.