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docker41 [41]
3 years ago
6

A rectangle has an area of 0.24 of a square meter.

Mathematics
1 answer:
Tpy6a [65]3 years ago
7 0

Answer:

0.8 by 0.3 square meters

Step-by-step explanation:

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The average price of an item is $42 with a standard deviation of $3
FinnZ [79.3K]

The mean price goes between $ 41.16 and $ 42.84, so a value of $ 48 is unusually high.

Since the average price of an item is $ 42 with a standard deviation of $ 3, to find a 98% confidence interval about the mean, and determine if a value of X = 48 is unusually high or if it is normal, the following calculations should be done:

  • (((42 - 3) + (42 + 3)) / 2) x 0.98 = X
  • ((39 + 45) / 2) x 0.98 = X
  • 42 x 0.98 = X
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  • (((42 - 3) + (42 + 3)) / 2) x 1.02 = X
  • ((39 + 45) / 2) x 1.02 = X
  • 42 x 1.02 = X
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Therefore, as the mean price goes between $ 41.16 and $ 42.84, a value of $ 48 is unusually high.

Learn more about maths in brainly.com/question/25908442

8 0
2 years ago
There are 20 entries in the chess tournament. How many ways can they finish in first, second,
Romashka [77]

Answer:

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Step-by-step explanation:

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There are 20 people who can get in first place.  After that, there are 19 people who can get in second place.  Finally, there are 18 people who can get in third place.  So:

20 * 19 * 18 = 6840

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Sphinxa [80]

Answer:    the answer is  2

Step-by-step explanation:

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Step-by-step explanation:

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