Answer: Are you in 6th grade? :0 i just learned ancient civilizations, it's A, by the way
Explanation: They wanted durable currencies that wouldn't break because it would be difficult to start trade and purchase the goods, and if they did break, they'd just be losing money, technically.
The answer is Count. Count is an aggregate method in SQL that returns the number of rows for a specified column that have non-null values.
<h3>What is the Meaning of Null?</h3>
When a field in a database has no values at all, this is known as null and indicates that the field’s value is unknown.
A null value for a number field, text field, or space value is different from a zero value. Null indicates that no value has been recorded in a database field.
A value and a null cannot be compared. The Structured Query Language query cannot be written as SELECT * FROM Customer where email Address=null, for instance, if it is intended to obtain all customers without email addresses from a Customer Addresses table.
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Answer: A. centralized decision-making
The centralization of decision making is not among the basic principles of the US free enterprise system. The six basic principles are the freedom to choose employment or business, property rights, profit motive, competition, rule of law and consumer sovereignty.
Answer:
Reliance on available subjects(convenient sampling)
Explanation:
Reliance on available subjects(convenient sampling): It is about relying on the subject that deals with the great caution factor in the research. It is also called a convenient sampling. In this sample, the researcher does not have any control over the representatives of the sample size. This sampling method is used to measure the characteristics of people at a particular time. Convenient sampling is used as a pilot study at the beginning of the research. So this is a useful method but the result outcomes are not generalized to the population.
