144. 
distributive property distributed a number outside of a parenthesis inside, i.e. x(12•12). 
considering there is no given parenthesis, the answer is simply 144.
        
             
        
        
        
Answer:
729 is 3 to the power of 6
Step-by-step explanation:
 
        
                    
             
        
        
        
It will take about 16.66 months for the investment to double.
Hope this helps.