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Zepler [3.9K]
4 years ago
13

What will be the answer ?

Mathematics
2 answers:
Dima020 [189]4 years ago
4 0

Answer:

A= 377.02

Step-by-step explanation:



gogolik [260]4 years ago
3 0

Answer:

159.21 units²

Step-by-step explanation:

Half the side length can be found from ...

... s/2 = 7×tan(360°/20) ≈ 7×0.324920 ≈ 2.27444 . . . units

The area is then the product of half the perimeter and the given apothem:

... Area = 10(s/2)×7 ≈ 70×2.27444 ≈ 159.21 . . . . units²

_____

<em>Check</em>

The area of the inscribed circle will be πr² = π×49 ≈ 153.94 units². This must be slightly smaller than the area of the decagon, and it is.

___

<em>Comment on the area formula</em>

In this situation, you are often taugth to us the formula

... A = 1/2Pa . . . . . where P = perimeter and a is the apothem.

Given only the apothem, we find we can compute the area from the equivalent formula ...

... A = n·a²·tan(180°/n) . . . . where n is the number of sides

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It says 5 points bro
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A box contains 20 red balls, 25 white balls, and 55 blue balls. Suppose that 10 balls are selected at random one at a time with
hoa [83]

Answer:

0.164 = 16.4% probability that at least one color will be missing from the 10 selected balls.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

Determine the probability that at least one color will be missing from the 10 selected balls.

Red missing:

Each time, there are 55 + 25 = 80 non-red balls, out of 100. So, in each of the 10 trials, 80% = 0.8 probability of not picking a red ball. The probability that no red ball is picked is given by:

(0.8)^10 = 0.1074

White missing:

55 + 20 = 75 non-white balls, out of 100, in each trial. The probability that no white ball is picked is given by:

(0.75)^10 = 0.0563

Blue missing:

45 non-blue balls, out of 100. The probability that no blue ball is picked is given by:

(0.45)^10 = 0.0003

Total:

0.1074 + 0.0563 + 0.0003 = 0.164

0.164 = 16.4% probability that at least one color will be missing from the 10 selected balls.

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4 years ago
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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