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frutty [35]
3 years ago
5

Identify which type of sampling is​ used: random,​ systematic, convenience,​ stratified, or cluster. To determine customer opini

on of their check dash in service​, American Airlines randomly selects 110 flights during a certain week and surveys all passengers on the flights.
Mathematics
1 answer:
azamat3 years ago
8 0

Answer:

This is cluster sampling.

Step-by-step explanation:

American Airlines randomly selects 110 flights during a certain week and surveys all passengers on the flights.

This is a type of cluster sampling.

This type of sampling is done by dividing the population into different groups and a simple random sample of clusters is selected from the population.

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Please help fast <br>need it by today
KiRa [710]
6. It is asking you to find the surface area for this one:

1 litre = 0.001 cubic meters
15.4 litres = 0.0154 cubic meters

The volume of the cylinder has to be 0.0154m^3.

V = (pi(r)^2)h
0.0154 = (pi(r)^2)(1)
r^2 = 0.0154/pi
r = 0.07m

Surface Area of Circles on Bottom:
A = pi(r)^2
A = pi(0.07)^2
A = 0.0154
0.0154*2 = 0.0308m^2

Surface Area of Walls:
This will be the circumference of the circle times the height, since the walls are just like a big rectangle.

C = 2pi(r)
C = 2pi(0.07)
C = 0.44m
0.44*1 = 0.44m^2

Finally, add the two surface areas:
0.44 + 0.0308 = 0.47m^2

You will need 0.47m^2 of sheet metal to make this cylinder.

7. Find the volume of everything and just the graphite, and subtract the graphite’s volume from everything to get just the wood. The volume of a cylinder is pi((r)^2)h.

Everything:
Watch out for units, since the diameter is in mm and the length is in cm.

r = 3.5mm or 0.35cm
V = pi((0.35)^2)(14)
V = 5.34cm^3

Graphite:

r = 0.5mm or 0.05cm
V = pi((0.05)^2)(14)
V = 0.11cm^3

5.34 - 0.11 = 5.23cm^3

8. For this problem, it wants your answer in cm^3. Find the volume of one bowl and multiply it by 250:

r = 3.5cm
V = pi((3.5)^2)(4)
V = 153.94cm^3

153.94*250 = 38484.51cm^3 of soup needed.

I sure hope that I didn’t confuse you too much with all of my math gibberish (sorry). Please let me know if there is anything else that I can help with. Have a nice day
3 0
3 years ago
Which recursive formula can be used to represent the sequence 2,5,8,11,14,..
Natasha_Volkova [10]
The answer is D. a1=2 an=an-1+3
6 0
3 years ago
The answer to my question
poizon [28]
The answer would be B. because a unit rate is usually equal to one for the sake of conversion
5 0
3 years ago
Read 2 more answers
2
Butoxors [25]

Answer:

C

Step-by-step explanation:

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8 0
3 years ago
Gamal spent $12. 50 at the book store. The difference between the amount he spent at the video game store and the amount he spen
AysviL [449]

Answer: The options are kinda weird

But the solution to x - 12.5 = 17 is x = 29.5, so whichever equation you plug this into is correct is the right equation...

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