Answer:
$72
Step-by-step explanation:
one lb costs $12 so just multiply it by 6
 
        
                    
             
        
        
        
Answer: B. 
Step-by-step explanation:
The notation to express a dependent variable is given by :-
 , where Y is depending variable which is dependent upon x ( independent variable).
, where Y is depending variable which is dependent upon x ( independent variable).
The given statement : The distance an airplane travels depends on how much time it spends flying. 
Here , Independent variable : Time
Dependent variable : Distance
Then , the notation to express distance (dependent variable)  the airplane flies in 20 minutes is given by :-

 
        
             
        
        
        
Answer:
389.9 to 1 decimal place
If you need another explanation comment on this one