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Vinvika [58]
2 years ago
11

Where is the 90 degree angle?

Mathematics
1 answer:
Dovator [93]2 years ago
3 0

Answer:

Step-by-step explanation:

A

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The life expectancy (in hours) of an electric bulb is normally distributed with a mean of 5000 and a standard deviation of 1000.
Sergeu [11.5K]

Answer:

P(z>1.3) = 0.9032

Step-by-step explanation:

We are given:

Mean = 5000

Standard deviation = 1000

x = 6300

P(x>6300)=?

z-score =?

z-score = x- mean/standard deviation

z-score = 6300 - 5000/1000

z- score = 1300/1000

z-score = 1.3

So, P(x>6300) = P(z>1.3)

Looking at the z-probability distribution table and finding value:

P(z>1.3) = 0.9032

So, P(z>1.3) = 0.9032

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3 years ago
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1 year ago
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Use the diagram below to solve for x and y. Please help! Fast if possible.
Mila [183]

Answer:

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Step-by-step explanation:

8 0
3 years ago
Triangle DEF, with vertices D(2, 5), E(6, 4), and F(3, 3), is reflected across the line y=x. A student determined one of the ver
4vir4ik [10]
The vertices of the image reflected over the line y = x are:
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3 years ago
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Which of the following ratios is not equal to the other two?
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Answer:

2:1

Step-by-step explanation:

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