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stepan [7]
3 years ago
12

Please help

Mathematics
1 answer:
bonufazy [111]3 years ago
4 0

Answer:

1. 50 is 20% of 250

Step-by-step explanation:

In order to find any of these, use the equation.

Number/Out of = %

Then plug in the values

50/x = .20

Then solve by cross multiplying

50 = .20x

250 = x

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Aliun [14]

Answer : 0.0129

Step-by-step explanation:

Given : Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger carriers is \mu=13.4 years and standard deviation is \sigma=1.7 years.

Sample size : n=40

Let X be the random variable that represents the age of fleets.

We assume that the ages of the fleets of the 10 largest U.S. commercial passenger carriers are normally distributed.

For z-score,

z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}

For x=14

z=\dfrac{14-13.4}{\dfrac{1.7}{\sqrt{40}}}\approx2.23

By using the standard normal distribution table , the probability that the average age of these 40 airplanes is at least 14 years old will be :-

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3 years ago
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Which of the following prefixes is the best for measuring small quantities like the thickness of a dime A.milli B.kilo C.deci D.
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Milli is the best to measure the thickness of a dime. A is your answer.
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Mimo sper 56.24 for a new binder $195 for a notebook, and
viktelen [127]

Answer:

251.24$

Step-by-step explanation:

In order to find the answer to this question you just need to add the total cost together.

What we do know:

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Hope this helps.

7 0
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umka2103 [35]

Answer:I don't know if you're asking for equation or not cause you didn't mention the question so I'm just gonna write down the equation.

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You said it's the y-intercept but it's not. it's just a point on the graph

Step-by-step explanation:

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