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Anna11 [10]
3 years ago
10

A book is 3.5 cm thick and each cover is 1.8 mm thick . how thick is the book without its covers​

Mathematics
2 answers:
Reptile [31]3 years ago
4 0
1.8mm=0.18cm
3.5cm-0.18cm=3.32cm
kolezko [41]3 years ago
3 0

Answer: 4.7 cm

Step-by-step explanation:

<h3>Because </h3><h3>1.5mm =0.15 cm ,</h3><h3>so both covers together would be 0.3 cm , subtract that from 5 cm,i.e.,</h3><h3>5 -0.3 = 4.7 cma book has two covers one at front and at back</h3><h3 /><h3>so 1.5 +1.5 =3 mm</h3><h3 /><h3>so 10 mm = 1 cm</h3><h3 /><h3>convert 5 cm to mm as 5 * 10 = 50 mm</h3><h3 /><h3>50-3 = 47 mm or 4.7 cm</h3><h3>Have a awesome night✨</h3>
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Answer:

At least 202.44 mm in the top 15%.

Step-by-step explanation:

When the distribution is normal, we use 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 question, we have that:

\mu = 134, \sigma = 66

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At least X mm.

X is the 100-15 = 85th percentile, which is X when Z has a pvalue of 0.85. So X when Z = 1.037.

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Answer:

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Step-by-step explanation:

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