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max2010maxim [7]
2 years ago
12

How many different pairs of parallel edges are there on a rectangular solid?

Mathematics
1 answer:
Monica [59]2 years ago
4 0

Answer:

18

Step-by-step explanation:

A rectangular prism has four parallel edges along its length, four parallel edges along its width, and four parallel edges along its height.

We want to know how many different pairs of parallel edges there are.  Starting with the length, the number of unique pairs is:

₄C₂ = 6

The same is true for the width and height.  So the total number of different pairs of parallel edges is:

3 × 6 = 18

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Step-by-step explanation:

Given in the question Mustafa's annual salary = $67,200

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Since we know that 401 k plan is a retirement plan in which an employee gets the exemption from his salary on a pretax basis.

Therefore exemption will be = 11% of $67,200

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