Answer:
63
Step-by-step explanation:
It took 3 hours for her to deliver 189 total.
We need delivery per hour for our answer.
189 / 3 = 63
63 new papers are delivered per hour.
 
        
                    
             
        
        
        
Answer:
The number of boys who play tennis is 36. 
Step-by-step explanation:
Let the number of boys who play tennis is x. 
number of boys who play cricket = y
x = 3 y..... (1)  
12 boys plays both cricket and tennis. 
According to the question, 
x - 12 = y + 1 2
3 y - 12 = y + 12
2 y = 24 
y = 12 
So, the number of boys who plays tennis is x = 3 x 12 = 36.  
 
        
             
        
        
        
Answer:
its 5.795
Step-by-step explanation:
 
        
                    
             
        
        
        
Recall the logarithm rules :
a^y = x  is the same as log_a x = y
In this case, 
a = 18
y = r - 10
x = 93
So,
18^ (r-10) = 93
is the same as
log_18  93 = r - 10
Solve for r to get :
10 + log_18  93 = r