Please help me with this as soon as you can. I have no idea how to do it so please help me.

Answer:

1

Step-by-step explanation:

The value of z-score will be –0.4. Then the correct option is B. The probability will be 0.34458. Then the correct option is C.

The z-score is a statistical evaluation of a value's correlation to the mean of a collection of values, expressed in terms of standard deviation.

The z-score is given as

z = (x – μ) / σ

Where μ is the mean, σ is the standard deviation, and x is the sample.

The annual salary of teachers in a certain state X has a mean of $54,000 and standard deviation of σ = $5,000.

The probability that the mean annual salary of a random sample of 64 teachers from this state is less than $52,000 will be

The mean of the sampling distribution of sample of means is $54,000 and the standard deviation is select an answer $5000.

Then the z-score will be

z = (52000 – 54000) / 5000

z = –2000 / 5000

z = –0.4

Then the correct option is B.

Then the probability will be

P(x < 52000) = P(z < 0.-4)

P(x < 52000) = 0.34458

Then the correct option is C.

More about the z-score link is given below.

https://brainly.com/question/15016913

#SPJ2

Answer:

Mean=685

Variance=36.7

Step-by-step explanation:

The mean of uniform discrete distribution can be expressed as the average of the boundaries

mean=( b+a)/2

The variance of uniform discrete distribution can be expressed as the difference of the boundaries decreased by 1 and squared, decreased by 1 and divided by 12.

σ²=[(b-a+1)^2 - 1]/12

We were given the wavelength from from 675 to 695 nm which means

a= 675, b= 695

We can now calculate the mean by using the expresion below

mean=( b+a)/2

Mean=( 675 + 695)/2

=685

The variance can be calculated by using the expression below

σ²=[(b-a+1)^2 - 1]/12

σ²=[(695-675+1)^2 -1]/12

σ²=440/12

σ²=36.7

Therefore, the the mean and variance, of the wavelength distribution for this radiation are 685 and 36.7 respectively

Answer:

yes because it is written as a fraction

Answer:

Yes it is.

Step-by-step explanation:

5/20 is the fraction we're starting off with. let's make it into a decimal. 20x5 is 100, and 5x5 is 25. So the fraction we have now is 25/100, which is similar to .25. .25 is a rational number since it represents the fraction, ratio 25/100. Both 25 and 100 are integers.

Answer:

labeled is the answer your looking for

Answer: C The rate of change for the function for video a is constant but the rate of change for video b is not constant

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Distribute the -2 into (3x-6)

combine like terms!!

8x+4

Answer:

A.) 8x + 4

Step-by-step explanation:

Answer:

The weights of ice cream cartons produced by a manufacturer are normally distributed with a mean weight of 10 ounces and a standard deviation of 0.5 oun

Answer:

Option 2: 5.34 is the correct answer.

Step-by-step explanation:

As it can be seen that the given triangle is a right-angled triangle.

Here

Base = 12

Perpendicular = x

θ = 24°

We can use trigonometric ratios to find the value of x. We have to choose a trigonometric ratio which involves base and perpendicular as we only know these two and the angle in the triangle

So,

[tex]tan 24 = \frac{perpendicular}{base}\\0.4452 = \frac{x}{12}\\x = 0.4452*12\\x = 5.3424[/tex]

Rounding off to nearest hundredth

x = 5.34

Hence,

Option 2: 5.34 is the correct answer.

Answer:

b

Step-by-step explanation:

20% of 5000 is 1000 so 5000-1000=4000

Answer:

the answer is A trust me its right

Answer:

391 chips

Step-by-step explanation:

This is a Poisson distribution problem with the formula;

P(X = k) = (e^(-λ) × λ^(k))/k!

Let n be the number of chips she puts in the dough.

Since she makes chocolate chip cookies in batch of 100, then the mean number of chips is n/100.

So, λ = n/100

Now, we want to find how many chips should she put in the dough so that the probability your cookie contains no chip is 0.02.

Thus;

P(X = 0) = (e^(-λ) × λ^(0))/0! = 0.02

This gives;

e^(-λ) = 0.02

Putting λ = n/100, we have;

e^(-n/100) = 0.02

-n/100 = In 0.02

-n/100 = -3.912

n = -100 × -3.912

n ≈ 391 chips

Answer:

it is A

Step-by-step explanation:

Vertical angles are angles that are opposite eachother

Answer:

11 22 333 444 66% 88 have a blessed day and get 100% ok

Step-by-step explanation:

Answer:

2(x+4)

Step-by-step explanation:

To factor you have to divide both terms by the greatest common factor, which in this case is 2. Using distribution you can check your answer.

Answer: 2(x + 4)

Explanation: If you're asked to factor a polynomial,

the first thing you want to look for is the greatest common factor

for the terms that are involved.

The greatest common factor of 2x and 8 is 2.

So a 2 can factor out.

Inside the parenthses, we have each term divided by

the 2 that factored out of the polynomial.

So we have 2(x + 4).

Answer:

1. [tex]x>6[/tex]

2. [tex]b<-24[/tex]

3. [tex]w>7[/tex]

4. [tex]s\leq 7[/tex]

5. [tex]g\leq 20[/tex]

6. [tex]f<11[/tex]

7. [tex]m<-14[/tex]

8. [tex]p\leq 9[/tex]

Step-by-step explanation:

9. [tex]c>-4[/tex]

10. [tex]y\leq -9[/tex]

11. [tex]t\leq 10[/tex]

12. [tex]k\geq 18[/tex]

13. [tex]x<-4[/tex]

14. [tex]c<24[/tex]

15. [tex]m\geq -3[/tex]

16. [tex]n<21[/tex]

Answer:

That is that It is Most not More

Answer:

It is number 3

Step-by-step explanation:

Answer: 20 ways

Step-by-step explanation:

Given:  There were 5 women, 4 men, 6 girls and 7 boys at a birthday party.

i.e. Number of women = 5

Number of men = 4

According to the fundamental counting principle , we have

(Number of women ) x (Number of men)

= 5 x 4

= 20

Hence,  1 woman and 1 man can be chosen in 20 ways to take coats.

Answer:

thank you! you too

Answer:

Nice thanks for the tip! (and the free points) Have a good holiday to urself too!

Step-by-step explanation:

Answer:

the dog eats 2.8 pounds of dog food per day

Step-by-step explanation:

Answer:

Step-by-step explanation:

x + y = 11

Answer:

Last option is the correct answer.

[tex] m\angle A = 61°, m\angle B = 57°, m\angle C = 61°[/tex]

Step-by-step explanation:

Since, 61° + 57° + 61° = 179° < 180°

Therefore,

[tex] m\angle A = 61°, m\angle B = 57°, m\angle C = 61°[/tex] cannot be the measurements of triangle ABC.

m=5

b=0

y=5x+0

trust me

Answer:

Step-by-step explanation:

1. False D' is in quad 4

2. True it is reflected about the y axis. That puts it in 3. If it was rotated about the x axis, it would be in quad 1

3. As long as there is no point going through the origin, then the statement in 3 is true. You have to understand that in quad 4 all y values are minus.

4. False. If D was entirely contained in quad 2, then in quad 3 the x values will be minus. As a matter of fact, so will the y values.

Answer: y = -3/4x - 0.75

Step-by-step explanation:

The slope needs to be negative so that it's perpendicular to

y = 3/4x - 1

The equation then looks like this

y = -3/4x

We can get an exact y intercept number by using the cordinates

Lets input cordinates (3,-3)

-3 = -3/4(3)

-3 = -2.25 - 75 ( I inferenced )

-3 = -3

now that we got the y intercept lets put it all together

y = -3/4x - 0.75