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9966 [12]
3 years ago
13

Find the circumference of the circle 8.5cm

Mathematics
1 answer:
Vanyuwa [196]3 years ago
8 0

Answer: The circumference of the circle is 53.38 cm.

Step-by-step explanation:

Circumference of the circle is the distance around the circle.

Formula used:

C = 2\pi r

Where,

C is circumference of circle

r is radius of circle

Given:

Radius of circle = 8.5 cm

Now putting all the given values in the above formula, we get:

C = 2\pi r\\C=2\times 3.14\times 8.5cm\\C=53.38cm

Therefore, the circumference of the circle is 53.38 cm.

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Alex

Answer:

Sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.

Step-by-step explanation:

To yield a more accurate estimate of the population mean, margin of error should be minimized.

margin of error (ME) of the mean can be calculated using the formula

ME=\frac{z*s}{\sqrt{N} } where

  • z is the corresponding statistic in the given confidence level(z-score or t-score)
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for a given confidence level, and the same standard deviation, as the sample size increases, margin of error decreases.

Thus, random sample of 50 people from population A, has smaller margin of error than the sample of 20 people from population B.

Therefore, sample mean from population A has probably more accurate estimate of its population mean than the sample mean from population B.

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3 years ago
What does it mean his average per game but it does not tell me how many games
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The correct answer would be that if Dimitri improves his average by 1, he would have a 13.375 rebound per game average.

Although they don't tell you how many games he place, we can still solve. This is because we are adding an average to an average and therefore don't need to know totals.

12.375 + 1 = 13.375

8 0
3 years ago
Simplify 5 square root of 11 end root minus 12 square root of 11 end root minus 2 square root of 11 . (1 point)
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explanation:
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so, -9√11
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