The correct answer is plumbing
        
                    
             
        
        
        
Answer: Money Supply Decrease of $50 million. 
Explanation:
$40 million was deposited while $50 million was withdrawn. 
The net change in the banking system would therefore be,
= 40 - 50 
= -$10 million
($10 million ) means that more money left than came in. 
The money supply can be calculated as the net change multiplied by the money multiplier. 
The Money Multiplier is denoted as 1/reserve requirement.
Change in Money Supply is,
= -10 million * 1/20%
= -$50 million 
Going by the negative number it means that Money Supply reduces by $50 million. 
 
        
             
        
        
        
Answer: a. The drone option should be chosen because it is the least expensive in terms of both fixed cost and variable cost.
b. A and 20000, B and 20000
Explanation:
a. From the information provided, the correct option is option B "The drone option should be chosen because it is the least expensive in terms of both fixed cost and variable cost".
This statement is wrong has the drone has the largest fixed cost and variable cost. It's fixed cost of $100,000 is more than that of $70,000 and $60,000 for others.
b. A and 20000, B and 20000
A is preferred at volumes below 20000 while B is preferred at volume above 20000.
 
        
             
        
        
        
Some people might reject the gospel message because they have a different opinion on the matter, they have a different religion, or they simply don't understand. People tend to reject things they don't understand.