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miskamm [114]
3 years ago
7

Which sampling method divides the population up into​ sections, randomly selects some of those​ sections, then chooses all the m

embers from the selected sections to​ study? choose the correct answer below?
Mathematics
1 answer:
Advocard [28]3 years ago
3 0

Which sampling method divides the population up into​ sections, randomly selects some of those​ sections, then chooses all the members from the selected sections to​ study?

Answer: The above mentioned type of sampling is called cluster sampling.

Cluster sampling is a sampling technique in which the entire population of interest is divided into clusters or groups, then the investigator randomly selects some of these clusters and all the members of these randomly selected clusters are investigated.


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The angle of depression from a bird sitting on top of a telephone pole to the base of a tree is 63 degrees if the telephone pole
Andre45 [30]

Answer:

9.17 feet.

Step-by-step explanation:

See the diagram attached to this answer.

Let, AB is the pole and CD is the tree.

From the top of the pole to the base of the tree the angle of depression as per the condition is 63°.

So, ∠ EBC = ∠ ACB = 63° {Since, BE ║ AC}

So, from Δ ABC, \tan 63 = \frac{AB}{AC} = \frac{18}{AC} {Given height of the tower AB = 18 feet}

⇒ AC = \frac{18}{\tan 63} = 9.17 feet.

Therefore, the distance between the pole and the tree is 9.17 feet. (Answer)

6 0
3 years ago
What are the solutions to the equation 3(x-4)^2=27
Rom4ik [11]

Answer:

x=1, x=7

Step-by-step explanation:

Firstly, you can simplify by dividing both sides by 3, which will make the equation easier to simplify:

(x-4)^2=9

Next, you can take the square root of each side, which will cancel the square, and make the 9 even easier to work with:

(x-4)=(± )3

*Note the (± ) sign, this is because there is a positive and negative answer*

After this, you will basically have two equations:

(x-4)=3

and

(x-4)=-3

You are going to solve both to get both answers, but lets start with the positive first:

x-4=3     Add 4 to both sides to get an x= equation

<u>x=7</u>

And it's the same thing for the negative:

x-4=-3     Add 4 to both sides to get an x= equation

<u>x=1</u>

Hope this helps

8 0
3 years ago
-3(-2-3x6)-5{4+2(-1)}
lidiya [134]

Answer:

The answer is 50

Step-by-step explanation:

= -3(-2-3×6)-5{4+2(-1)}

= -3(-2-18)-5{4-2}

= -3(-20)-5{2}

= 60-10

= 50

5 0
3 years ago
Read 2 more answers
Making art and can help you find a difference 13 - 5 ​
Genrish500 [490]

Answer:

Here's how to solve

Step-by-step explanation:

Okay so 13 -5

What can you add to 5 to get 13?

5+5=10

5+6=11

5+7=12

5+8=13

8 would be your answer.

5 0
3 years ago
Courtney must earn at least $150 to pay for broken window. She earns $10 for every car she washes.
valkas [14]

Answer:

10c ≥ 150

At least 15 cars (or c ≥ 15)

Step-by-step explanation:

If she gets $10 for every car she washes a car then 10c is the rate of her gaining money and she needs at least (greater than or equal to) $150.

This equation can be used to express the situation:

10c ≥ 150

<em>To solve you divide the 10 from both sides of the inequality to get.</em>

c ≥ 15

5 0
2 years ago
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