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3 years ago

fran reads 54 pages per hour.Darnell reads 60 pages per hour.If they bot read for 2.5 hours, how many pages will darnell read?

Mathematics

1 answer:

Paraphin [41]3 years ago

7 0

150 pages, you have to multiply 60 by 2.5

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According to the World Health Organization (WHO) Child Growth Standards, the head circumference for boys at birth is normally di

Elena L [17]

Answer:

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

This z score tell to us how many deviations we are below or above the mean for a given normal distribution.

For the case of Eddie we got:

$z= \frac{33.2-34.5}{1.3}= -1$

And for the case of Sue we got:

$z = \frac{32.7-33.9}{1.2}= -1$

So then for both cases we see that Eddie and Sue are 1 deviation below the true mean for each gender so then the best conclusion for this case would be:

C.They are the same size relative to other children of the same sex.

Step-by-step explanation:

We can define the random variable X as the head circumference for boys at birth and we know that the distribution for X is given by:

$X\sim N(\mu = 34.5, \sigma=1.3)$

Similarly we can define the random variable Y as the head circumference for boys at birth and we know that the distribution for Y is given by:

$Y\sim N(\mu = 33.9, \sigma=1.2)$

And we know that Eddie was born with 33.2 cm and Sue with 32.7 cm for the head circumference . Since we are interested to determine which child's head circumference is smaller relative to other children of the same sex, we can use the z score formula given by this formula:

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

This z score tell to us how many deviations we are below or above the mean for a given normal distribution.

For the case of Eddie we got:

$z= \frac{33.2-34.5}{1.3}= -1$

And for the case of Sue we got:

$z = \frac{32.7-33.9}{1.2}= -1$

So then for both cases we see that Eddie and Sue are 1 deviation below the true mean for each gender so then the best conclusion for this case would be:

C.They are the same size relative to other children of the same sex.

5 0

3 years ago

Pleaseeeeeeeee helppp

Stolb23 [73]

2(x-1)=42
2x-2=42
2x=44
X=22

8 0

2 years ago

Write one hundred billion one hundred million one hundred thousand one hundred in numbers

KonstantinChe [14]

100,100,100,100 is the answer

3 0

3 years ago

What’s the answer ????

sukhopar [10]

0.

The x on the bottom will cancel out the x on the top here.

7 0

3 years ago

Read 2 more answers

How many ways are there to select 25 books from a collection of 27 books? i am just studying today

laiz [17]

notice, this will just be a Permutation.

$\bf _nP_r=\cfrac{n!}{(n-r)!}\qquad \qquad \stackrel{\textit{25 books off a total of 27}}{_{27}P_{25}=\cfrac{27!}{(27-25)!}} \\\\\\ _{27}P_{25}=\cfrac{27!}{2!}\implies 5444434725209176080384000000$

you can always check your calculator also for a [ ₙPᵣ ] button.

4 0

3 years ago