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3 years ago

I need someones help!

Mathematics

1 answer:

Neporo4naja [7]3 years ago

4 0

The y intercept is 20 and the slope is up 1 over 5

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A rotating wind turbine has a diameter of 185 feet in the circumference is about 580 feet. It’s smaller model of the turbine has

Flauer [41]

Ross-multiplication.

circumference divided by the diameter

10/x = 580/185

10x185=1850

1850/580=3.189

8 0

4 years ago

Barron's reported that the average number of weeks an individual is unemployed is 17.5 weeks. Assume that for the population of

Olin [163]

Answer:

$P(16.5$

And using the normal standard table or excel we find the probability:

$P(-1.768< Z< 1.768) = P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the avergae number of weeks an individual is unemployed of a population, and for this case we know the distribution for X is given by:

$X \sim N(17.5,4)$

Where $\mu=17.5$ and $\sigma=4$

Since the distribution for X is normal then, the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu= 17.5, \frac{\sigma}{\sqrt{n}}= \frac{4}{\sqrt{50}}=0.566)$

We select a sample of n =50 people. And we want to find the following probability

$P(16.5$

And using the normal standard table or excel we find the probability:

$P(-1.768< Z< 1.768) = P(Z$

4 0

4 years ago

Find the percent of the number.<br>20% of 90

expeople1 [14]

Answer:

Step-by-step explanation:

90 x 0.2 = 18

7 0

3 years ago

Read 2 more answers

What is the transformation that occurs to the equation y=2^x if it changes to y=2^x-3

gizmo_the_mogwai [7]

The parent function is: y = 2^x and it it transformed to: y = 2^x - 3. Both are exponential functions. First we can find the value of y, when x = 0. For the 1st function: y = 2^0 = 1 For the 2nd function: y = 2^0 - 3 = 1 - 3 = - 2 We can conclude that the 2nd value of y is 3 units lower than the first. Answer: This transformation is translation 3 units down.

4 0

3 years ago

A number is ten less than seven times the number. What is the number?

Grace [21]

X+10=7x
10=6x
10/6=x
1 4/6 = x
1 2/3 =x

Hope this helps :)

6 0

3 years ago