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Understand the difference between what a class is and what an object is. - How controlling access in java works? - Access modifiers (package, private, etc.) - Implicit vs. explicit use of this keyword - What constructor are and difference between default/parametrized and overloaded constructors - Instance variables and static vs. none static methods - Class composition (has-a relationship) - References to objects of different classes within a class

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Final answer:

The number of possible arrangements for 40 computers in rows, where each row has the same number of computers, equals the number of divisors of 40, which is eight. So, the correct answer is D) 8.

Step-by-step explanation:

The question involves finding the number of possible arrangements of 40 computers in a technology classroom, where each row has the same number of computers. We need to figure out the number of divisors of 40 that can be used to arrange the computers equally in rows. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. Therefore, there are eight possible arrangements of the computers.In order to find the number of possible arrangements, we need to determine the factors of 40. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40. These factors represent the number of rows the computers can be arranged in. Therefore, there are 8 possible arrangements (C) for the 40 computers.

Since we're looking for the total number of possible arrangements, and each number above is a different way to arrange the computers in rows, the correct answer to the question would be D) 8. It's important to recognize that we only count each divisor once, even though it represents an arrangement along both its width and length (e.g., 4 rows of 10 computers or 10 rows of 4 computers is still the same arrangement).

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