Answer:
It would decrease, but not necessarily by 8%
 
        
             
        
        
        
Answer: They are fed 4/9 of what the polar bears are fed.
Step-by-step explanation:
 7/9*4/7=
1/9*4/1=4/9
The 7's get cancelled out.
                                         
 
        
             
        
        
        
Okay, so 75 counts for 30% (exams), 80 counts for 20% (term paper), and 85 counts for 50% (final exam)
So you would multiply 30% by 75, 20% by 80, and 50% by 85. That would be 22.5, 16, and 42.5. Add these numbers up, and put them over the total percentage, 100%. So you would have 81/100. The student's final average is 81%.
        
             
        
        
        
This would be 5^2 because you have to subtract the exponents.