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Answer:
Step-by-step explanation:
We are given that a variable force of magnitude F(x) moves a body along the x- axis from to
.
The net work done by the force in moving the body from to
.
=Velocity of the body at
Velocity of the body at
We know that
Work done=Final kinetic energy-Initial kinetic energy
K.E=
Hence, the net work done by the force is given by
Using the arrangement formula, it is found that there are possible seating arrangements.
The number of possible arrangements of n elements is given by the <em>arrangement formula</em>, as follows:
- It is used when n elements are arranged in n positions.
In this problem, <u>28 students are arranged on 28 desks</u>, hence , and:
Hence, there are possible seating arrangements.
You can learn more about the arrangement formula at brainly.com/question/24648661