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maw [93]
3 years ago
7

PLEASE HELP NO LINKS PLEASE In a certain town, 62% of the residents enjoy riding roller coasters. Alfred takes a sample of 75 re

sidents from this, town. What is the probability that fewer than 58% of the residents in the sample enjoy riding roller coasters? Find the z-table here. O 0.238 O 0.433 O 0.714 O 0.762​
Mathematics
2 answers:
Ksivusya [100]3 years ago
8 0

Answer: NOT 0.433

Step-by-step explanation:

Lorico [155]3 years ago
3 0

Answer:

Option B

Step-by-step explanation:

Here ,

The mean value is 0.62

Z value formula is

z = (x' -mean)/(sigma/sqrt (n))

Substituting the given values, we get -

sigma = Sqrt {(x'-mean)^2/n}

Sigma = sqrt { (0.58-0.62)^2/75} = 0.09

z = (0.58-0.62)/(0.09)

z = -0.433

Hence, option B is correct

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A cylinder has diameter of 4ft and a height of 9ft. Explain whether halving the diameter has the same effect on the surface area
elena55 [62]

Answer:

See Below

Step-by-step explanation:

The surface area of cylinder is given by the formula:

SA=2\pi r^2 + 2\pi r h

Where

r is radius ( diameter is 4, so radius is 4/2 = 2)

h is height ( h = 9)

Lets find original surface are:

SA=2\pi r^2 + 2\pi r h\\SA=2\pi (2)^2 + 2\pi (2) (9)\\SA=8\pi +36\pi\\SA=44\pi

<u>Halving diameter:</u>

diameter would be 4/2 = 2, so radius would be 2/2 = 1

So, SA would be:

SA=2\pi r^2 + 2\pi r h\\SA=2\pi (1)^2 + 2\pi (1) (9)\\SA=2\pi +18\pi\\SA=20\pi

<u>Halving height:</u>

Height is 9, halving would make it 9/2 = 4.5

Now, calculating new SA:

SA=2\pi r^2 + 2\pi r h\\SA=2\pi (2)^2 + 2\pi (2) (4.5)\\SA=8\pi + 18\pi\\SA= 26\pi

Original SA is 44\pi,

Halving diameter makes it 20\pi

Halving height makes it 26\pi

So, halving diameter does not have same effect as halving height.

5 0
3 years ago
5/8 teaspoon baking soda with 1/3 teaspoon of salt equals how many teaspoons together
Korolek [52]
23/24 teaspoons together

5 0
3 years ago
Read 2 more answers
1. Plot at least 10 points whose y-coordinate is -4.
irina [24]

Answer:  answer in screenshots down below

Step-by-step explanation:

7 0
2 years ago
A baseball diamond is shaped like a square with each side measuring 30<br> yards.
devlian [24]
Walter is right cause 30x5 equals 150
5 0
2 years ago
What is the image point of (-6, 9) after a translation left 4 uints and down 1 unit?
Alex17521 [72]

Answer:

(-10,8)

Step-by-step explanation:

So our original point is (-6,9).

A translation of 4 units to the left means that the x-value would go left by 4. In other words, we subtract 4 to -6. We subtract because going to the left means that it's going to the negative direction.

A translation of down 1 unit means that the y-value would go down by 1. In other words, we subtract 1. Again, we subtract because going downwards means that it's going to the negative direction.

Therefore, the new point would be:

(-6-4,9-1)\\=(-10,8)

6 0
3 years ago
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