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Slav-nsk [51]
3 years ago
10

What is the exact circumference of the circle?

Mathematics
2 answers:
Nitella [24]3 years ago
7 0
We know, Circumference = <span>π * Diameter
So, c = </span><span>π * 8
c = 8</span><span>π

In short, Your Answer would be Option C

Hope this helps!</span>
AveGali [126]3 years ago
5 0

Answer:

c.

Step-by-step explanation:

because

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What is the area of a parallelogram with a base of 38 meters and a height of 12 meters?
8090 [49]

For this case we have by definition that the area of a parallelogram is given by:

A = b * h

Where:

b: It's the base

h: It's the height

According to the data we have:

b = 38\ m\\h = 12 \ m

Substituting in the formula:

A = 38 * 12\\A = 456

The area of the parallelogram is A = 456 \ m ^ 2

Answer:

A = 456 \ m ^ 2

4 0
3 years ago
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140°<br> 6x + 20<br> Solve for x
yan [13]

Answer:

140

Step-by-step explanation:

7 0
3 years ago
Simplify the expression.<br> The expression is<br> (5x+1/2)+(9x-2 1/2)
Alexxandr [17]
All you have to do here is combine like terms.
5x + 9x = 14x
.5 - 2.5 = -2

14x - 2
5 0
3 years ago
What is the variance?<br> What is the standard deviation, rounded to the nearest whole number?
Dmitry [639]

Answer:

What is the variance? 84000

 What is the standard deviation, rounded to the nearest whole number? 290

5 stars if this helped  

Step-by-step explanation:

8 0
3 years ago
A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain sca
blondinia [14]

The confidence interval for mean of the "before-after" differences is \fbox{(-0.4037,1.8037)}

Further explanation:

Find the difference between the before pain and the after pain.

Difference = before-after

Kindly refer to the Table for the difference of between the before and after pain.

Sum of difference = 5.6

Total number of observation = 8

Mean of difference = 0.7

Sample standard deviation s = 1.3201

Level of significance = 5\%

Formula for confidence interval = \left( \bar{X} \pm t_{n-1, \frac{\alpha}{2}\%} \frac{s}{\sqrt{n}} \right)

confidence interval = \left( 0.7 \pm t_{8-1, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)

confidence interval = \left( 0.7 \pm t_{7, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)

From the t-table.

The value of t_{7, \frac{5}{2}\%=2.365

Confidence interval = ( 0.7 \pm 2.365}\times \frac{1.3201}{\sqrt{8}}) \right)

Confidence interval = \left( 0.7 - 2.365}\times \0.4667,0.7 + 2.365}\times \0.4667) \right

Confidence interval = (0.7-1.1037,0.7+1.1037)

Confidence interval = \fbox{(-0.4037,1.8037)}

The 95\% confidence interval tells us about that 95\% chances of the true mean or population mean lies in the interval.

Yes, the hypnotism appear to be effective in reducing pain as confidence interval include includes the positive deviation from the mean.

Learn More:

1. Learn more about equation of circle brainly.com/question/1506955

2. Learn more about line segments brainly.com/question/909890  

Answer Details:

Grade: College Statistics

Subject: Mathematics

Chapter: Confidence Interval

Keywords:

Probability, Statistics, Speed dating, Females rating, Confidence interval, t-test, Level of significance , Normal distribution, Central Limit Theorem, t-table, Population mean, Sample mean, Standard deviation, Symmetric, Variance.

7 0
3 years ago
Read 2 more answers
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