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Gnesinka [82]
3 years ago
12

I need help please! Picture below

Mathematics
2 answers:
Sladkaya [172]3 years ago
7 0
The correct answer would be A
Anon25 [30]3 years ago
6 0

Answer:

The answer is A

Step-by-step explanation:

A * 2 = 1/2πr^2 * 2

2A / π = πr^2 / π

\sqrt{\frac{2a}{\pi } }= \sqrt{r^2}

So, the answer is A because r = \sqrt{\frac{2a}{\pi } }

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The mean number of words per minute (WPM) read by sixth graders is 86 with a variance of 225. If 44 sixth graders are randomly s
Dmitry [639]

P(X<=x) = 1 + 5.486 = 6.486

The z-score of the information given is,

z = (x - µ )/ σ

Where,

µ = mean

σ = standard deviation

From the information given,

x = 3.71

µ = 86

σ  = √225 = 15

hence,

z = (3.71 - 86)/15 = -5.486

thus,

P(X<=x) = 1 + 5.486 = 6.486

hence , P(X<=x) = 1 + 5.486 = 6.486

Learn more about variance here brainly.com/question/9304306

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3 0
2 years ago
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natta225 [31]
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Solnce55 [7]

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8 0
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Plz help....according to the graph
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Hi the answer to this is 

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Answer:

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