Answer:
Positive 48 or 48
Step-by-step explanation: When we multiply a negative by a negative, it ends up being a positive. -8 x -6=48 
 
        
             
        
        
        
Answer:
Step-by-step explanation:
If you graph there would be two different regions. The first one would be 

And the second one would be 
 .
. 
If you rotate the first region around the "y" axis you get that 

And if you rotate the second region around the "y" axis you get that 

And the sum would be  2.51+4.188 = 6.698 
If you revolve just the outer curve you get 
If you rotate the first  region around the x axis you get that 

And if you rotate the second region around the x axis you get that 

And the sum would be 1.5708+1.0472 = 2.618
 
        
             
        
        
        
Answer:
$11,000
Step-by-step explanation:
Because, 
20,000 + 2000 = 22,000
22,000 / 2 = 11,000