Answer:
Do u have answer choices? 
 
        
                    
             
        
        
        
Answer with positive exponent =  or
 or  
Answer with negative exponent = 
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Explanation:
The rule we use is

If we multiply two exponential expressions with the same base, then we add the exponents. 
The base for each is 5. The exponents 4 and -7 add to -3.
This means

To convert to a positive exponent, we apply the reciprocal to the base. We go from 5, aka 5/1, to 1/5.
So, 
 
        
             
        
        
        
<h3>
Answer: Choice C</h3>
The base 16 is the same as 4*4.
From there, the rule  is used to get
 is used to get 
Afterward, the exponents are added getting 1/2+1/2 = 2/2 = 1. The rule is  which only works if the bases are both the same.
 which only works if the bases are both the same. 
 
        
        
        
Answer:
(x + 6)(x - 4)
Step-by-step explanation:
x² + 2x - 24
(x + 6)(x - 4)
-4 and +6 multiply to 24 and add to +2.
 
        
             
        
        
        
90 days=3 months
5,000×0.05×3=750