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Rashid [163]
3 years ago
13

Please helpppp Extra points and brainleist

Mathematics
1 answer:
vladimir1956 [14]3 years ago
5 0

Answer:

B

Step-by-step explanation:

x² - 4x - 7 = 0

(x - 2)² = 11

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Ruby has a bird feeder which is visited by an average of 13 birds every 2 hours during daylight hours. What is the probability t
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Answer:

62.93%

Step-by-step explanation:

We have to solve it by a Poisson distribution, where:

p (x = n) = e ^ (- l) * l ^ (x) / x!

Where he would come being the number of birds that there would be in 40 minutes, we know that in 2 hours, that is 120 minutes there are 13, therefore in 40 there would be:

l = 13 * 40/120

l = 4,333

Now, we have p (x> 3) and that is equal to:

p (x> 3) = 1 - p (x <= 3)

So, we calculate the probability from 0 to 3:

 p (x = 0) = 2.72 ^ (- 4.33) * 4.33 ^ (0) / 0! = 0.01313

p (x = 1) = 2.72 ^ (- 4.33) * 4.33 ^ (1) / 1! = 0.0568

p (x = 2) = 2.72 ^ (- 4.33) * 4.33 ^ (2) / 2! = 0.12310

p (x = 3) = 2.72 ^ (- 4.33) * 4.33 ^ (3) / 3! = 0.17767

If we add each one:

0.01313 + 0.0568 + 0.12310 + 0.17767 = 0.3707

replacing:

p (x> 3) = 1 - 0.3707

p (x> 3) = 0.6293

Which means that the probability is 62.93%

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Diana can earn money for the tickets she sells. Which of the following statements describes the variables in this situation corr
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Statements are absent? Srry! :(

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Change 72 out of 123 to a percentage
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Answer:

72 / 123 * 100 = 58.53658537  per cent

Step-by-step explanation:

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Well lets try using negatives and positives, negatives for underground positives for above. -6 + 14 = 8 then 8 - 11 = -3. When Herman finally stops climbing he is 3 feet below ground level.
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Find two numbers whose sum is 44 and whose difference is 6.<br> smaller number<br> larger number
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X+ y = 44
x - y = 6
—————
2x = 50

x = 25
y = 44-x = 19
3 0
3 years ago
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