Answer:
True 
Step-by-step explanation:
Some of our energy comes from electrical power plants 
 
        
                    
             
        
        
        
12.36% I think sorry if its wrong ;-;
 
        
             
        
        
        
Answer:
50000y^9.
Step-by-step explanation:
(2y)^4 * (5y)^5
= 2^4 y^4 *  5^5 y^5
= 16y^4 * 3125y^5
= 50000y^9.
 
        
             
        
        
        
Answer:
(use algebra) 1st no. is a,2nd no. is 8 times the 1st which is 8a, 3rd no. 100 more than 1st which is a+100
total is 420, thus a+8a+a+100=420
10a+100=420, take 100 to the other side
10a=320 hence 32
1st no. is 32, 2nd is 256, 3rd is 356