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Svetlanka [38]
3 years ago
9

Can someone please help me.

Mathematics
2 answers:
AfilCa [17]3 years ago
6 0
All sides would be 9, area= length times width so 9x9 is 81 all sides are 9
vampirchik [111]3 years ago
5 0
Because it is a square all sides are equal so all sides are 20.25 because half of 81 is 40.5 and half of that is 20.25.
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tino4ka555 [31]

Answer:

6 swimmers in the first heat can be arranged in 1716 different ways.

Step-by-step explanation:

A swim meet has 13 contestants signed up. To calculate the arrangement of first 6 swimmers in first heat we will use combinations because order doesn't matter.

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= ^{13}C_{6}

= \frac{13!}{(6!)(13-6)!}

= \frac{13\times 12\times 11\times 10\times 9\times 8\times 7!}{6!\times 7!}

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= \frac{1235520}{720}

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