Set theory Need answers quick

Answer:

Step-by-step explanation:

No, the results are not necessarily representative of the school as a whole.

A random survey is a research technique that is used to gather information from a sample of people or things in a population. The results of a random survey are more likely to be representative of the population as a whole since every member of the population has an equal chance of being chosen to take part in the research.

Given:

Ivy randomly surveys students in her school to learn more about mobile phone password use.

Of 25 respondents, 14 use a password.

If the survey was conducted on a volunteer basis, it is possible that the respondents who chose to participate may have different characteristics or behaviors than those who did not participate.

This could lead to a biased sample that does not accurately represent the entire school population.

Additionally, even if the sample is representative of the school population, a sample size of 25 is relatively small, which can increase the margin of error and make it more difficult to draw accurate conclusions.

Therefore, it is important to consider the limitations of the survey method and sample size when interpreting the results.

To learn more about the random survey;

https://brainly.com/question/4691267

#SPJ7

The complete question:

Ivy randomly surveys students in her school to learn more about mobile phone password use.

Of 25 respondents, 14 use a password.

If Ivy conducted her survey of 25 students on a volunteer basis, are the

results representative of the school?

Answer:

-11

Step-by-step explanation:

if you put the numbers of the variebles in, it would be

-6-9+9-5

Answer:

9

-6a = 54

9x = -45

54 + (-45) = 9

Average calling period in March down to 600 seconds

Step-by-step explanation:

Given:

Average calling period in February = 750 seconds

Average Decreased in calling period = 20%

Find:

Average calling period in March

Computation:

Average Decreased in calling period = 20%

Average Decreased in calling period = 0.20

Average calling period in March = Average calling period in February[1 - Average Decreased in calling period]

Average calling period in March = 750[1 - 0.20]

Average calling period in March = 750[0.80]

Average calling period in March = 600 seconds

Learn more:

https://brainly.com/question/6201432?referrer=searchResults

I'm so happy I got down to 600 seconds. A complete description is provided below.

According to the question,

In march,

In February,

then,

= [tex]\frac{20}{100}\times 750[/tex]

= [tex]150 \ sec[/tex]

hence,

→ In march I got down to,

= [tex](750-150) \ sec[/tex]

= [tex]600 \ sec[/tex]

Thus the above solution is appropriate.

Learn more:

https://brainly.com/question/24309807

equivalent ratio of 16:18 is 8:9

Answer:

(3+4)^2=9+24+16

7^2

=49

Answer:

1 3/4 simplified or 1 12/16 not simplified

Answer:

The bacteria would be 1 half of 1,000,000.

Step-by-step explanation:

If it decreases by 1/2 each following hour, after 2 hours there would  be no bacteria left.

The population of bacteria after 6 hours will be equal to 31250 and the sequence followed here is a geometric sequence.

It is given that bacteria population is 1000000 and it decreases by a factor of 1/2 per hour.

We have to find out the bacteria left after 6 hours and also if this sequence is a geometric sequence or not.

What do you mean by geometric sequence ?

A geometric sequence is the sequence which is made by multiplying by the same value each time i.e., 2 , 4 , 8 , 16 where each time numbers are multiplied by a common factor 2.

As per the question ;

A bacteria population = 1000000

It decreases by a factor of 1/2 per hour.

So ;

After 1 hour population will be ;

= 1000000

After 2 hour population will be ;

= 1000000 × [tex]\frac{1}{2}[/tex]

= 500000

After 3 hours population will be ;

=  500000 × [tex]\frac{1}{2}[/tex]

= 250000

After 4 hours population will be ;

= 250000 × [tex]\frac{1}{2}[/tex]

= 125000

After 5 hours population will be ;

=  125000 × [tex]\frac{1}{2}[/tex]

= 62500

After 6 hours population will be ;

= 62500 × [tex]\frac{1}{2}[/tex]

= 31250

And

because from the second term , the ratio of each term to previous term is same i.e., 1/2. So this is a geometric sequence.

Thus , the population of bacteria after 6 hours will be equal to 31250 and the sequence followed here is a geometric sequence.

To learn more about geometric sequence click here ;

https://brainly.com/question/24643676

#SPJ2

Answer:

46

Step-by-step explanation:

The missing length is 10-4 = 6

Therefore perimeter = 5 + 6 + 8+ 4+13 +10

=46

Answer:

[tex] - {5c}^{4} \times ( { - c}^{8} ) \\ \\ = 5 \{( {c}^{4} ) \times (c {}^{8} ) \} \\ \\ [/tex]

from law of indices:

[tex] {a}^{n} \times {a}^{m} = {a}^{(n + m)} [/tex]

therefore:

[tex] = 5 \{ {c}^{(4 + 8)} \} \\ \\ { \boxed{ = 5 {c}^{12} }}[/tex]

Answer:

si es noucha beua A inua gua ;)

Step-by-step explanation:

Answer:

= 2+10²× 1

= 2+(10*10)× 1

= 2+100×1

= 2+100

=102

Answer: 102

Step-by-step explanation: 2+(10^2)(1)

2+(100)(1)

2+100

102

Answer:

A and C

Step-by-step explanation:

A. 6÷0.2=30

B. 0.6÷0.2=3

C. 60÷2=30

D. 600÷2=300

Let the cubic meters of gravel = x

Set up the equation:

4000 + 1500x = 18,000

Now solve for x:

4000 + 1500x =  18000

Subtract 4000 from both sides:

1500x = 14000

Divide both sides by 1500:

x = 14000/1500 = 140/15 = 28/3

Answer: 28/3

Lifted amount be x

ATQ

[tex]\\ \sf\longmapsto 1500x+4000=18000[/tex]

[tex]\\ \sf\longmapsto 1500x=18000-4000=14000[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{14000}{1500}[/tex]

[tex]\\ \sf\longmapsto x=\dfrac{140}{15}[/tex]

[tex]\\ \sf\longmapsto x=7.3[/tex]

Step-by-step explanation:

x+45=180 [v.o.a]

x=180-45

.°.x=95

y+90=180°[v.o.a]

y=180-90

.°.y=90

Answer:

Let width of rectangle be x cm.

3x+x+3x+x=39

8x=39

x=39÷8

=39/8

=4/7/8

3x=39/8×3

=117/8

=14/5/8

Hence, length=14/5/8cm while width=4/7/8cm.

You can easily imagine a circle around your graphic. And then you remember that a circle has a total of 360 degrees all the way around the center.

This means that the following sum 4x + 2x + 3x = 360

⇔ 9x = 360

We divide both side by 9 and we get :

⇔ x = 360 / 9 = 40

So X value is 40°.

Answer:

A. Sequence 2 is arithmetic and Sequence 1 is geometric

Step-by-step explanation:

Hello,

Answer A

-10,20,-40,80,.... is geometric= Sequence 1

15,-5,-25,-45.... is arithmetic= Sequence 2

Step-by-step explanation:

puzzle 1)

domain is (1,2,3,4,5)

puzzle 2)

range is (3,4,5)

puzzle 3)

domain is(-2,1,2,4)

puzzle 4)

range is (1,3)

so the answer is BEHC

Answer:

42

Step-by-step explanation:

Altogether, there are 42 such cities in Bangladesh. 11 of these cities can be considered major cities as these are governed by "City Corporations". All of the "City Corporation"-governed cities currently have a population of more than 200,000 (which is not a criterion for the status).

Answer:

Step-by-step explanation:

According to the Bangladesh Bureau of Statistics and the Ministry of Local Government, Rural Development and Co-operatives of Bangladesh, there are 532 urban centres in Bangladesh. The bureau defines an urban centre with a population of 100,000 or more as a "city". Altogether, there are 42 such cities in Bangladesh.

_______________________

I Hope It Is Helpful For You.

Answer:

zero point five

Step-by-step explanation:

zero point five

Answer:

40.5

Step-by-step explanation:4 1/2 x 9

Answer:

40.5

Step-by-step explanation:

Given:

Multiply:

4 1/2 × 9 =

40.5 or 40 1/2

Hope this helped.

Answer:

A.

Step-by-step explanation:

5>4

6>2

5 is greater than 4, 6 is greater than 2

Answer:

Area is equal to 37.5 m

I hope it's helps you

Answer:

solution

Let x = width

length = 10x-28 (28 feet less than 10 times its width)

A=l*w

A=(10x-28)

902=10x^2-28x

10x^2-28x-902=0

(10x-41) (10x+22)=0

10x-41=0

10x=41

x=41÷10

x=4.1

Now,

Length =28(4.1)-10

Therefore length =104.8

(Hope this is correct <3)

The length of the rectangle will be 104.8 feet.

The space occupied by any two-dimensional figure in a plane is called the area. The space occupied by the rectangle in a two-dimensional plane is called the area of the rectangle.

Given that a rectangle has a length of 28 feet less than 10 times its width. If the area of the rectangle is 902 square feet

The length of the rectangle will be calculated as below:-

Let x = width

Length = 10x-28 (28 feet less than 10 times its width)

A= L x w

A=(10x-28)

902=10x²-28x

10x²-28x-902=0

(10x-41) (10x+22)=0

10x-41=0

10x=41

x=41÷10

x=4.1

The length will be calculated as below:-

Length  = 28(4.1)-10

Length  = 104.8

Therefore, the length of the rectangle will be 104.8 feet.

To know more about the area follow

https://brainly.com/question/25292087

#SPJ2

Answer:

About 300 minutes

Step-by-step explanation:

She can eat 41 jelly beans in 10 minutes and she has eaten 1231

You need to divide 1231 by 41 (then you will know how many sets of 41 jelly means she ate)

It will give you 30.024390...

and if she at this many sets of 41 and each 41 is 10 minutes,

then you have to multiply 30 by 10

you get about 100 minutes

I think :)

Answer:

1)

Find the union of A and B:

Find the complement of above:

2)

Find the intersection of A∩C:

Find the complement of above:

Answer:

84x

Step-by-step explanation:

Solve in the bracket first,

4x-8x×(2-11)+8x

4x-8x(-9)+8x

Solve -8x(-9) =72x

4x+72x+8x

84x

Is the final answer

0

Step-by-step explanation:

1+2=3+2=5×0=0 that is the answer i think