The correct answer would be $204.80 because if she keeps doubling whats in the bank the amount after the $ .20 then it would be doubled to $ .40 and so on
        
             
        
        
        
20 times 4 will get to 80
        
                    
             
        
        
        
Answer:
f = 
Step-by-step explanation:
1. 4(4f - 9) = -(2-f)               distribute the negative
2. 4(4f - 9) = -2 + f           Distribute the 4
3. 16f - 9 = -2 + f            Subtract f on both sides
4. 15f - 9 = -2                  Add 9 on both sides
5. 15f = 7                 Divide both equations by 15
6.  
  
f = 
 
        
             
        
        
        
Answer:
The answer is 54 cubes.
Step-by-step explanation:
 
        
             
        
        
        
1 time=2mins
xtimes=30mins
30/2 ×1= 15.
Therefore it can be completed 15 times in 30mins