Pretty sure it's the 4th one
<span>The commercial dishwashers available are provided with one tank that provides the needed hot water with temperature that is ranging from 110 degrees F to 140 degrees F. The answer to this item is letter B. This allows sanitizing of the materials inside the dishwashers.</span>
The experimental units are what you apply the treatments to. In this experiment it would be the subjects or the customers in this situation since they will be treatment (either standing at their regular height or squatting to meet the eye level which could affect the amount of tip they give). An example of randomization can be numbering each table in the restaurant and picking them out of a hat and going to that table that you randomly chose and imposing the treatment on the customers there. Because tips depend on the income of the customers and how much they are willing to give for their meal. If not even income some people are willing to give despite how much money they make so their tips may higher than the wealthy crowd. Other factors the experimenters may not be able to control is the mood of the customers as well isn't it more likely if someone is enjoying their time to give more to the server despite the service the waiter.
Scarcity determines the economic value of an item by the amount of goods produced.
<h3 /><h3>What is economic scarcity?</h3>
It corresponds to a context where there is a greater demand than supply for a good or service, generating an economic imbalance.
Therefore, in a situation of scarcity, consumers' desires may be limited, leading to higher prices and reduced purchasing power.
Find out more about scarcity here:
brainly.com/question/3081250
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Finances, they were poor after the war.
