Answer:please refer to the explanation section
Explanation:
Mechanic = $100
Vet = $100
Alex (payment from vet) = $100
Will's $100 bill has created $300. 
This situation is explained in detail by the concept known has the multiplier. The multiplier measures how much impact will a change in an exogenous variable will cause in endogenous variables, for example How much a increase in Government spending will change Gross Domestic Product.
The multiplier in this case is 3, 
 
        
             
        
        
        
Andrew writes a check for $1,299 which is the  medium of exchange.
What is the way of transaction ?
- A sale is a completed agreement between a buyer and a dealer to change goods, services, or fiscal means in return for plutocrats. 
- The term is also generally used in commercial accounts. As a business secretary, this plain description can get tricky.
-  A sale may be recorded by a company before or later depending on whether it uses an addendum account or cash account.
Here,
Andrew can easily determine that the price of the computer is more than the price of the vacation = Unit of Account
Andrew has $1,574 in his checking account 
= Store of value
Andrew writes a check for $1,299 
= Medium of exchange
Learn more about Way of transaction here:
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Answer:
B
Explanation:
Bid rotation is when contractors collude and  take turns in winning a bid. Colluding contractors submit bids but take turns being the low bidder. 
Bid-tailoring is when an employee in collusion with a contractor tailors bid specifications to give an unfair advantage to a certain contractor.
Complementary bids are bids intended only to give the appearance of a genuine bid. Colluding  bidders submit higher priced or deliberately defective bids to in order to ensure the selection of the designated winner at inflated prices.  
Phantom bids are fake bids
 
        
             
        
        
        
Jan pays $70 each month for her auto insurance policy. This regular payment is called PREMIUM.
Premium is the payment made by the insured party to the insurer. It primary pays the insurer for bearing the risk of payout in the event that the insurance agreement coverage is needed. Premium payment may be monthly, quarterly, semi-annually, or annually.
        
             
        
        
        
The distribution of income in the United States has become less equal over the last 20 years. This means that the difference between the rich and the poor has grown. It could mean that the rich have started getting more money while the poor get what they used to get, or even less. In any case, the gap between their income has changed greatly during this time period.