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fgiga [73]
3 years ago
12

Assume the mean useful life of a particular light bulb is 2,000 hours and is normally distributed with a standard deviation of 3

00 hours. Calculate the useful life of light bulbs within two standard deviations of the mean.
Mathematics
1 answer:
Yuri [45]3 years ago
4 0
The mean = 2,000
s = Sigma ( standard deviation ) = 300
M - 2 s = 2,000- 2 * 300 = 2,000 - 600 = 1,400
M + 2 s = 2,000 + 2 * 300 = 2,000 + 600 = 2,600
Answer.
Useful life of light bulbs within 2 standard deviations of the mean is:
A ) Between 1,400 and 2,600 hours
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Step-by-step explanation:

the number of pupils are in the lower school

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4 0
3 years ago
What is the value of x?
andrey2020 [161]

Answer:

x = 30°.

Step-by-step explanation:

To calculate the value of 'x', we can first derive the value of one of the angles that make up the triangle.

Notice that there is an angle with a measure of 100°. The angle that makes up the angle of the triangle is called a Vertical Angle. Therefore, if the angle in red is 100°, the vertical angle, or the third angle of the triangle, is 100°.

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7 0
3 years ago
Read 2 more answers
In your notebook, draw several perpendicular lines. what kind of angles are formed? acute angles obtuse angles right angles
Ainat [17]
Right angles will be formed because in drawing 
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Firlakuza [10]

Answer:

For the one including 4w the answer is - 7

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Step-by-step explanation:

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Always write it in the variables perspective.

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7 0
3 years ago
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Nataly [62]

Answer:

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Step-by-step explanation:

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