Answer:
            
Step-by-step explanation:
 
        
                    
             
        
        
        
What's a hundredth? 
it's like this: 
0.01
so where is the hundred place in this number?
389.9<em>9</em>3
it's the 9 that i made boldface
so to round to this number we delete everything after it, asking ourselves if the number after it is 4 or less? yes! so we can just delete it without changing anyway
389.99
        
             
        
        
        
Answer:
Step-by-step explanation:
y= 1/2x + −7/2
 
        
             
        
        
        
The answer is 1 1/2 because if you divide 4 into 6 you get I need and a half or 1.5
        
             
        
        
        
Answer:
B. 8 x 10^3
Step-by-step explanation:
1.6 x 10^5 / 0.2 x 10^2
= 160 000 / 20
= 8 000
You can write this as 8 x 10^3