The diameter of a circle is 15 find the are ? I need help please

Mathematics

2 answers:

miss Akunina [59]4 years ago

7 0

Answer:

176.715

Step-by-step explanation:

Area of circle: $\pi r^{2}$

To find the radius: diameter divided by 2

15/2=7.5

pi * 7.5 * 7.5 = 176.715

**I found my answer using the actual number for pi, if you're using 3.14 as pi then the answer is 176.625**

alex41 [277]4 years ago

4 0

Answer:

176.71

Step-by-step explanation:

yupthatstheanswerbye

https://www.google.com/search?q=how+to+find+the+area+of+a+circle&rlz=1CAACAV_enUS724US724&oq=how+to+find+the+area&aqs=chrome.2.69i57j0l5.7673j0j7&sourceid=chrome&ie=UTF-8

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The lengths of nails produced in a factory are normally distributed with a mean of 4.84 centimeters and a standard deviation of

Helga [31]

Answer:

Top 3%: 4.934 cm

Bottom 3%: 4.746 cm

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 4.84, \sigma = 0.05$