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Scrat [10]
2 years ago
14

The circumstance of a circle is represented by 2 pie r. If the radius of the circle is double, then the circumference is

Mathematics
1 answer:
yarga [219]2 years ago
7 0

The circumference of the circle is given by C = 2 π r

If the radius of the circle is doubled, then new radius will be r' = 2r.

And new circumference will be C' = 2·π·(2r) = 2·(2 π r) = 2·C

It is clearly visible that new circumference is twice the original circumference i.e. C' = 4 π r

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Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her universi
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Answer:

0.0698

Step-by-step explanation:

Given :

Population mean, μ = 20

Sample mean, xbar = 21.1

Sample standard deviation, s = 4.3

Sample size, n = 35

The hypothesis :

H0 : μ = 20

H0 : μ > 20

The test statistic :

(xbar - μ) ÷ (s/√(n))

T = (21.1 - 20) ÷ (4.3/√(35))

T = 1.1 ÷ 0.7268326

Test statistic = 1.513

Using the Pvalue calculator :

df = n - 1 = 35 - 1 = 34

Pvalue(1.513, 34) = 0.06976

Pvalue = 0.0698 (4 decimal places)

3 0
2 years ago
At Southside Middle School, 30% of the students play an instrument. There are 310 students. How many students play an instrument
Drupady [299]
OK, so I think you divide 30 by 310 which would be... 1 R 10  or fraction one and one-third 1 1/3
Does this help?
5 0
3 years ago
Read 2 more answers
Find the equation of the line shown
ohaa [14]

Answer:

There is literally no line shown lol

3 0
3 years ago
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Can you help me with this question?<br> Thanks!
Natali5045456 [20]

Answer: 11 people like vanilla.

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5 0
3 years ago
Please help!!!<br><br> i've tried to search to understand but they all look so similar
kirza4 [7]

Answer:

Since dilation is not mentioned in the answer options, thus, the correct option is 'None of the above'.

Step-by-step explanation:

We know that when an object is dilated by a scale factor, it gets reduced, stretched, or remains the same, depending upon the value of the scale factor.

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The figure seems to have enlarged by a certain scale factor. Thus, the figure b is a result of dilation of the original figure by a certain scale factor.

Rotation, Reflection, and translation do not affect the size of the original figure.

Since dilation is not mentioned in the answer options, thus, the correct option is 'None of the above'.

5 0
2 years ago
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