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ratelena [41]
2 years ago
11

Which sample is biased?

Mathematics
2 answers:
djyliett [7]2 years ago
4 0

Answer:

D

Step-by-step explanation:

sorry if im wrong, but first two say random and third one says its and online survey, so everyone takes it, but the fourth one just say "two employees" those could be anyone, from only fat people to people that dislike coffee.

LUCKY_DIMON [66]2 years ago
3 0

Answer:

the anwer is A...

Step-by-step explanation:

i got it right

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What is the volume of a cone that has a height of 10 feet and a base with a diameter of 2 and half feet?
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Volume of a cone: 1/3\pir²h
r is the radius (diameter ÷ 2) and h is the height.

Find the radius first using the diameter: 2\frac{1} {2} ÷ 2 = 1.25

Now plug in the numbers into the formula.

1/3\pi1.25²10 = <span>16.4
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6. In a toy factory, 200 wooden closed cylinders of diameter 35 mm and height 7 cm have to be painted. What is the total surface
Pachacha [2.7K]

Answer:

6) About 19,244.75 square centimeters.

7)  About 4895 containers.

Step-by-step explanation:

Question 6)

We need to paint 200 wooden closed cylinders of diameter 35 mm and height 7 cm. And we want to find the total surface area that needs to be painted.

First, since the diameter is 35 mm, this is equivalent to 3.5 cm.

The radius is half the diameter, so the radius of each cylinder is 1.75 cm.

Recall that the surface area of a cylinder is given by the formula:

\displaystyle \text{SA}=2\pi r^2+ 2\pi rh

Where <em>r</em> is the radius and <em>h</em> is the height.

Therefore, the surface area of a single cylinder will be:

\displasytyle \text{SA}=2(3.142)(1.75)^2+2(3.142)(1.75)(7) = 96.22375\text{ cm}^2

Then the total surface area for 200 cylinders will be:

\displaystyle \text{SA}_{\text{total}}=200(96.22375)=19244.75\text{ cm}^2

Question 7)

We know that the tank has a diameter of 2.4 m and a height of 6.4 m.

Since its diamter is 2.4 m, then its radius is 1.2 m.

Find the total volume of the tank. The volume for a cylinder is given by:

\displaystyle V=\pi r^2h

Since <em>r</em> = 1.2 and <em>h</em> = 6.4:

\displaystyle V=(3.142)(1.2)^2(6.4)=28.956672\text{ m}^3

Each container has a base radius of 8.2 cm and a height of 28 cm.

So, the radius of each container is 0.082 m and the height is 0.28 m.

Then the volume of each container is:

\displaystyle V=(3.142)(0.082)^2(0.28)=0.005915506\text{ m}^3

Then to find the number of containers that can be filled by the tank, we can divide the two values. Hence:

\displaystyle C=\frac{28.956672}{0.005915506}=4895.045466\approx 4895

Thus, approximately 4895 containers can be filled.

5 0
2 years ago
Read 2 more answers
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