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Mrac [35]
3 years ago
15

Choose the correct description of the graph of the compound inequality:

Mathematics
2 answers:
MaRussiya [10]3 years ago
6 0
The answer is letter C.
Alborosie3 years ago
6 0
The answer is letter C.
You might be interested in
Please help! (Will give brainliest answer and hearts) Thank you and have a nice day!
qwelly [4]
A is your answer hope that helps
3 0
3 years ago
In a study of 346 comma 145 cell phone​ users, it was found that 26 developed cancer of the brain or nervous system. Assuming th
Y_Kistochka [10]

Answer:

a) P ( X ≤ 26 ) = 0.0134

b) The significance of the cell phone causing brain cancer is 1.34 or 0.0134

Step-by-step explanation:

Solution:-

- From the entire population of cell phone users os size N = 346,145 media reported n = 26 people who developed cancer of brain or nervous system.

- The probability of a person developing cancer of the brain or nervous system, assuming that cell phones have no effect, is p = 0.000113.

- Denote a random variable X: The number people who developed cancer of brain or nervous system are normally distributed.

- The expected or mean number of people who developed cancer of brain or nervous system are u = 40.

- The standard deviation ( s ) for the distribution would be:

                          s = \sqrt{u*( 1 - p ) }\\\\s = \sqrt{40*( 1 - 0.000113 ) }\\\\s = 6.3242\\

- The random variate X follows normal distribution with parameters:

                         X ~ Norm ( 40 , 6.3242^2 )

- The probability of X ≤ 26 cases from the total population of N = 346,145 can be determined by evaluating the Z-score standard value of the test statistics:

                                     

                        P ( X \leq  26 ) = P ( Z \leq  [ \frac{X - u }{s}  ) \\\\P ( Z \leq  [ \frac{ 26 - 40 }{6.3242}  ) = P ( Z \leq -2.21371 )

- Using standard normal table compute the probability on the left side of Z-score value -2.21371. Hence,

                       P ( X ≤ 26 ) = 0.0134

- The probability of the less than 26 number of cases who developed cancer of the brain or nervous system is 0.0134 as per media reports.

- So 1.34% of population is a case brain cancer due to cell phones according to media reports.

Which is significant less than the expected number of cases ( 40 ) that occur regardless of cell phone effect.

Answer:  The significance of the cell phone causing brain cancer is 1.34 or 0.0134.

 

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Cfrac%7B12%7D%7B20%7D" id="TexFormula1" title="\frac{12}{20}" alt="\frac{12}{20}" align="abs
Thepotemich [5.8K]

The percentage form of given fraction is 60% and the hundredths form is 0.60

According to the statement

we have given that the a fraction and we have to find the percentage of that fraction and write in the form hundredths.

So, For this purpose,

The given fraction is 12/20.

Then the definition of the percentage is that

The Percentage, a relative value indicating hundredth parts of any quantity.

so, the percentage of given fraction is :

Percentage fraction = 12/20 * 100

After solving it, The percentage fraction will become:

Percentage fraction = 60%

and Now convert into the hundredths form then

In the hundredths form it will become

from 60% to 0.60.

So, The percentage form of given fraction is 60% and the hundredths form is 0.60

Learn more about Percentage here

brainly.com/question/843074

#SPJ1

8 0
1 year ago
Complete the following sentence.<br><br> If x is to 9 as 8 is to 12, then x is equal to ?
Kamila [148]

Answer:

The answer is 6

Step-by-step explanation:

x/9 = 8/12

12x = 72

x = 6

Hope that helps :)

7 0
3 years ago
Read 2 more answers
3. Find the area of the trapezoid.
Ronch [10]

Answer:

262.5

Step-by-step explanation:

A=

a

b

2

h

=

12.5

17.5

2

17.5

=

262.5 i think....

3 0
3 years ago
Read 2 more answers
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