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Sergeu [11.5K]
3 years ago
10

A circular piece of glass has a radius of 0.8 meters. The glass sells for $4.60 per m². What is the total cost of the circular p

iece of glass?
Mathematics
1 answer:
Dafna1 [17]3 years ago
4 0
Well it's πr2 the area of a circle so the answer is π*.8*.8*4.60$ which is about 9.25$
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Using the normal distribution, it is found that the two readings that are cutoff values separating the rejected thermometers from the others are -1.96ºC and 1.96ºC.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

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

  • The z-score measures how many standard deviations the measure is above or below the mean.
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The mean and the standard deviation are given, respectively, by:

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The z-score that cuts off the bottom and top 2.5% of the distribution is z = \pm 1.96, hence:

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

-1.96 = \frac{X - 0}{1}

X = -1.96

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

1.96 = \frac{X - 0}{1}

X = 1.96

The two readings that are cutoff values separating the rejected thermometers from the others are -1.96ºC and 1.96ºC.

More can be learned about the normal distribution at brainly.com/question/27879230

#SPJ1

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