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Vladimir79 [104]
3 years ago
7

Me need help its hard

Mathematics
2 answers:
KatRina [158]3 years ago
7 0

Answer:

2. Cost of six books

3. Cost of one book

Step-by-step explanation:

I don't know about the rest though.

sertanlavr [38]3 years ago
5 0

Answer:

here are some of your answers

Step-by-step explanation:

2. Cost of six books

3. Cost of one book

have a great day!!!

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Answer:it’s b

Step-by-step explanation:

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3 years ago
The distribution of head circumference for full term newborn female infants is approximately normal with a mean of 33.8 cm and a
enyata [817]

Using the normal distribution, it is found that 95.65% of full term newborn female infants with a head circumference between 31 cm and 36 cm.

<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.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

\mu = 33.8, \sigma = 1.2

The proportion of full term newborn female infants with a head circumference between 31 cm and 36 cm is the <u>p-value of Z when X = 36 subtracted by the p-value of Z when X = 31</u>, hence:

X = 36:

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

Z = \frac{36 - 33.8}{1.2}

Z = 1.83

Z = 1.83 has a p-value of 0.9664.

X = 31:

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

Z = \frac{31 - 33.8}{1.2}

Z = -2.33

Z = -2.33 has a p-value of 0.0099.

0.9664 - 0.0099 = 0.9565.

0.9565 = 95.65% of full term newborn female infants with a head circumference between 31 cm and 36 cm.

More can be learned about the normal distribution at brainly.com/question/24537145

#SPJ1

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2 years ago
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never [62]

Answer:

answer is picture and shown

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Evaluate n(x) = -1- x + 4
VashaNatasha [74]

i got:

n = -1 + 3/x

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not sure if this helps but i hope it does somehow

8 0
3 years ago
Historians estimate that there were about 7 million people on the earth in 4,000 BCE. Now there are about 7 billion! We write 7
Ksju [112]
There are 1000 Times more people on earth right now than there was in 4,000 BCE. It's just 7billion divided by 7million.
8 0
3 years ago
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