<span>precision is after the decimal point. 
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Answer:
a 
Step-by-step explanation:
easy
 
        
             
        
        
        
Answer:
66 67/100
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
 Height of a cell tower is, 30 m
Step-by-step explanation:
Proportion states that the two fractions or ratios are equal.
As per the given statement:
Let height of a cell tower be h.
Height of a pole = 3m , 
Shadow of a pole = 4 m and 
shadow of a cell tower = 36+4 = 40 m
By definition of proportion;

Substitute the given values we get;

by cross multiply we get;

Divide both sides by 4 we get;
h = 30 m
Therefore, the height of a cell tower is, 30 m
 
        
             
        
        
        
There is no difference, 6rs-(-2rs) if you get rid of the parenthesis you are left with 6rs- -2rs and two negatives make a positive therefore the answer will become 8rs... I hope this helps :)