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3 years ago

15

If the diameter of a circle is 9 cm, then its circumference is 56.52 cm.?????

2 answers:

Tems11 [23]3 years ago

5 0

No the circumference of the circle is not 56.52. According to the formula which is pi x diameter all you have to do is multiply 9 times pi which is 3.14. This would equal 28.26cm, not 56.52cm.

IRISSAK [1]3 years ago

3 0

Circumference if the circle=
2πr or πd
Substitute the diameter=9cm into second equation
C=9π
C≈9×3.14
C≈28.26 cm. As a result, it is false that the circumference will be 56.52 cm if the diameter eqaul 9 cm. Hope it help!

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<h3>Normal Probability Distribution</h3>

In a normal distribution with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

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It measures how many standard deviations the measure is from the mean.

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In this problem, the mean and the standard deviation are given by, respectively, $\mu = 70, \sigma = 3$ .

The proportion of students between 45 and 67 inches is the p-value of Z when <u>X = 67 subtracted by the p-value of Z when X = 45</u>, hence:

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More can be learned about the normal distribution at brainly.com/question/24663213

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