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3 years ago

Answer these 2 questions please

Mathematics

2 answers:

Dmitry [639]3 years ago

8 0

Where’s the question?

horrorfan [7]3 years ago

8 0

What 2 questions. I can’t see any?

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Explain how you can round 25.691 to the greatest place.

julia-pushkina [17]

Since the 6 is bigger than 5 it means round up if it was a 4 you would round down
soo... 26

4 0

3 years ago

The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.917 g and a standard deviation

Nutka1998 [239]

Answer:

$z = \frac{0.872-0.917}{\frac{0.303}{\sqrt{37}}}= -0.903$

And we can find this probability to find the answer:

$P(z$

And using the normal standar table or excel we got:

$P(z$

Step-by-step explanation:

Let X the random variable that represent the amounts of nocatine of a population, and for this case we know the distribution for X is given by:

$X \sim N(0.917,0.303)$

Where $\mu=0.917$ and $\sigma=0.303$

We have the following info from a sample of n =37:

$\bar X= 0.872$ the sample mean

And we want to find the following probability:

$P(\bar X \leq 0.872)$

And we can use the z score formula given by;

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

And if we find the z score for the value of 0.872 we got:

$z = \frac{0.872-0.917}{\frac{0.303}{\sqrt{37}}}= -0.903$

And we can find this probability to find the answer:

$P(z$

And using the normal standar table or excel we got:

$P(z$

6 0

3 years ago

On a Saturday, a library checked out 52 books. If 24 of the books were fiction , what is the ratio if non-fiction books to ficti

vekshin1

I would guess 28 to 24

4 0

3 years ago

Read 2 more answers

Find the area of the quadrilateral ABCD.

REY [17]

Answer
—————————————-

3 0

2 years ago

Matrix A has 2 rows and 3 columns whereas matrix B has3 rows and 2 column

sergeinik [125]

Step-by-step explanation:

for any matrix multiplication number of columns of first matrix should be equal to number of rows of second matrix.

For AB

A has 3 columns and B has 3 rows so it matches . Hence can be multiplied.

For BA

B has 2 columns and A has 2 rows it also matches so can be multiplied

8 0

2 years ago