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denis23 [38]
2 years ago
14

The probability that a radish seed will germinate is 0.7. a gardener plants seeds in batches of 11. find the standard deviation

for the random variable x, the number of seeds germinating in each batch.
Mathematics
1 answer:
den301095 [7]2 years ago
3 0

To calculate for the standard deviation given the probability, we use the formula:

s = sqrt (n p q)

where s is standard deviation, n is number of samples = 11, p is probability of success = 0.7, q = 1 – p = 0.30

 

s = sqrt (11 * 0.7 * 0.3)

<span>s = 1.52</span>

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42

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fgiga [73]

Value of x is: x=6\pm\sqrt{23}i

Option B is correct option.

Step-by-step explanation:

We need to solve the equation x^2-12x+59=0 and find value of x.

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x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

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So, value of x is: x=6\pm\sqrt{23}i

Option B is correct option.

4 0
2 years ago
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Mai spends 7 and 3/5 hours in school each day. Her lunch period is 30 minutes long, and she spends a total of 42 minutes switchi
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First, we solve for the number of minutes in 7 and 3/5 hours by multiplying the number by 60 giving us,
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2 years ago
Two planes, A and B, start from the same place and move in different directions, making an angle of 50º between them. The speed
cluponka [151]

Answer: The distance between them is 230.65 miles.

Step-by-step explanation:

Since we have given that

Speed of plane A (b) = 200 miles per hour

Speed of plane B (c) = 300 miles per hour

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We will use the "Cosine formula", we get

a^2=b^2+c^2-2bc\cos A\\\\a^2=200^2+300^2-2\times 200\times 300\cos 50\textdegree\\\\a^2=40000+90000-120000\cos 50\textdegree\\\\a^2=130000-120000\times 0.64\\\\a^2=130000-76800\\\\a^2=53200\\\\a=\sqrt{53200}\\\\a=230.65\ miles\ per\ hour

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Answer:

a) 42°F < x < 176°F

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According to the Question,

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