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son4ous [18]
3 years ago
15

Which angles are vertical angles?

Mathematics
1 answer:
Gekata [30.6K]3 years ago
4 0

Answer:

BCF and DCA

Step-by-step explanation:

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The waking time of a student under common conditions is normally distributed with mean of 30 hours and a standard deviation of 5
Elina [12.6K]

Answer:

If the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 30 hours

Standard Deviation, σ = 5 hours

We are given that the distribution of waking time is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.95

P( X < x) = P( z < \displaystyle\frac{x - 30}{5})=0.95  

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 30}{5} = 1.645\\\\x = 38.225  

Thus, if the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

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3 years ago
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Answer:

ΔCFE is a right triangle

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Haaaaaaaaaaaaaaaaaaaaalllllllp plz
MA_775_DIABLO [31]

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square root of 166, 13, 14

Step-by-step explanation:

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What is the definition of intersection In math?
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Step-by-step explanation:

an intersection is a point, line, or curve common to two or more objects

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