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RideAnS [48]
3 years ago
15

Assigned seating forever! Ms. Clore has 28 desks in

Mathematics
1 answer:
Eddi Din [679]3 years ago
6 0

Using the arrangement formula, it is found that there are 28! = 3.05 \times 10^{29} possible seating arrangements.

The number of possible arrangements of n elements is given by the <em>arrangement formula</em>, as follows:

A_n = n!

  • It is used when n elements are arranged in n positions.

In this problem, <u>28 students are arranged on 28 desks</u>, hence n = 28, and:

A_{28} = 28! = 3.05 \times 10^{29}

Hence, there are 28! = 3.05 \times 10^{29} possible seating arrangements.

You can learn more about the arrangement formula at brainly.com/question/24648661

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Answer:

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Step-by-step explanation:

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Last year Lira earned $12,000 less than her husband Todd. Together they earned $75,000. How much did Lira earn last year?
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Given:

Last year Lira earned $12,000 less than her husband Todd.

Together they earned $75,000.

To find:

The amount earned by Lira in last year.

Solution:

Let x be the amount earned by Lira's husband inn last year.

Last year Lira earned $12,000 less than her husband Todd.

Amount earned by Lira = x-12000

Total amount earned by Lira and her husband = x+(x-12000)

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x=\dfrac{87000}{2}

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Now,

Amount earned by Lira = x-12000

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Therefore, the amount earned by Lira in last year is $31500.

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