Answer:
oh ok thanks for free points
Step-by-step explanation:
 
        
                    
             
        
        
        
My understanding is that when the power is a negative number, move it to the denominator and change it to positive. 
In this case, the base is y, the power is -3
y^(-3)=1/(y^3)
        
             
        
        
        
Answer: Speed in miles per hour is 45 mph.
Step-by-step explanation:
Since we have given that
Distance covered = 15 miles
Time taken to cover the above mentioned distance = 20 minutes
We need to calculate the speed in miles per hour , 
As we know the formula for " Speed " i.e.

Now, we will put the value of distance and time in the above formula:

Hence, Speed in miles per hour is 45 mph.
 
        
                    
             
        
        
        
Answer:
g∠-20
Step-by-step explanation:
 
        
             
        
        
        
(5^10 * 7^14)^10 =
5^(10 * 10) * 7^(14 * 10) =
5^100 * 7^140....its C....because ur multiplying the exponents