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NeTakaya
3 years ago
11

The area of the rectangle in this drawing is 65.13 square meters. The width of the rectangle is 3.9 meters. What’s the length? W

hat’s the perimeter? (The opposite sides of a rectangle are equal in length.)
Mathematics
1 answer:
ycow [4]3 years ago
8 0
65.13 / 3.9 = 16.7 meters = length
16.7 + 16.7 + 3.9 + 3.9 = 41.2 meters = perimeter
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Seventy-six percent of sunflower seeds will germinate into a flower, and a sample of 800 such sunflower seeds is randomly select
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Answer:

12.08

Step-by-step explanation:

For each sunflower, there are only two possible outcomes. Either it germinates, or it does not. The probability of a sunflower germinating is independent of other sunflowers. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The standard deviation of the binomial distribution is:

\sqrt{V(X)} = \sqrt{np(1-p)}

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This means that p = 0.76

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This means that n = 800

The standard deviation for the number of sunflower seeds that will germinate in such samples of size 800 is:

\sqrt{V(X)} = \sqrt{np(1-p)} = \sqrt{800*0.76*0.24} = 12.08

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