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marishachu [46]
3 years ago
9

How do you find the confidence interval for a one sample z test?

Mathematics
1 answer:
Shtirlitz [24]3 years ago
5 0
Can you take that picture again because i cant see.
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the volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of
FrozenT [24]

Answer:

The new volume is 8 times smaller than the original volume

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its volumes is equal to the scale factor elevated to the cube

Let

z-----> the scale factor

x ----> the volume of the reduced sphere

y ----> the volume of the original sphere

so

z^{3}=\frac{x}{y}

we have

z=1/2 ----> scale factor

substitute

(1/2)^{3}=\frac{x}{y}

(1/8)=\frac{x}{y}

x=\frac{y}{8}

therefore

The new volume is 8 times smaller than the original volume

Verify

The volume of the original sphere is

r=18/2=9\ cm ---> the radius is half the diameter

V=\frac{4}{3}\pi (9)^{3}=972\pi \ cm^{3}

the volume of the reduced sphere is

r=9/2=4.5\ cm ---> the radius is half the diameter

V=\frac{4}{3}\pi (4.5)^{3}=121.5\pi \ cm^{3}

Divide the volumes

972\pi \ cm^{3}/121.5\pi \ cm^{3}=8

4 0
3 years ago
Examine the following diagram:
Tanya [424]

Answer:

b

Step-by-step explanation:

i just took it on edge

5 0
3 years ago
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Carolyn answered 23 questions correctly for a score of 92%. How many questions were on the test?
Alla [95]

Answer:

25*0.92= 23 so she answered 23 question from 25 questions

Step-by-step explanation:

6 0
2 years ago
Draw a picture of a right triangle
Ksivusya [100]

Answer:

Step-by-step explanation:

4 0
3 years ago
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A store sells toys in bulk. It sells wooden blocks for $5 a pound and plastic bricks for $10
Veseljchak [2.6K]

9514 1404 393

Answer:

  • 6 # plastic bricks
  • 4 # wooden blocks

Step-by-step explanation:

Let p represent the number of pounds of plastic bricks in the mix. Then the number of pounds of wooden blocks is (10-p), and the total cost is ...

  10p +5(10-p) = 80

  5p = 30 . . . . . . . . . subtract 50

  p = 6 . . . . divide by 5; there are 6 pounds of plastic bricks in the mix

4 pounds of wooden blocks and 6 pounds of plastic bricks should be used to make a 10-lb mix worth $80.

5 0
2 years ago
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