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Furkat [3]
3 years ago
14

A match-seller arranges his matchboxes in a

Mathematics
1 answer:
dimaraw [331]3 years ago
7 0

Answer:

ok

Step-by-step explanation:

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The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard devi
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Answer:

Step-by-step explanation:

Since the length of time taken on the SAT for a group of students is normally distributed, we would apply the formula for normal distribution which is expressed as

z = (x - u)/s

Where

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u = mean time

s = standard deviation

From the information given,

u = 2.5 hours

s = 0.25 hours

We want to find the probability that the sample mean is between two hours and three hours.. It is expressed as

P(2 lesser than or equal to x lesser than or equal to 3)

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z = (2 - 2.5)/0.25 = - 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.02275

For x = 3,

z = (3 - 2.5)/0.25 = 2

Looking at the normal distribution table, the probability corresponding to the z score is 0.97725

P(2 lesser than or equal to x lesser than or equal to 3)

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6 0
3 years ago
What is 6 1/10 plus 5 4/5 ASAP please
Virty [35]

Answer:

11 9/10

Step-by-step explanation:

6 + 5 = 11

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11 + 9/10 = 11 9/10

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What is a reasonable distance between two cities? A. 200 km B. 200 m C. 200 cm D. 200 mm
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Answer:

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Step-by-step explanation:

200 m is only 0.12 miles

200 cm is 78 inches

200 mm is 20 cm or 7.8 inches

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3 years ago
If a point P(–1, –1) is reflected across the line y = –2, what are the coordinates of its reflection image?
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Since the line of refrection is a horizontal line, the x-coordinate of the image will be the same as the x-coordinate of the point P(-1, -1). P(-1, -1) is one unit above the line y = -2, hence the image will be one unit below the line y = -2. Therefore the coordinate of the image is (-1, -3)
8 0
3 years ago
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