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3 years ago

Is 7.787887888... a rational number?

Mathematics

2 answers:

Ugo [173]3 years ago

5 0

Answer:

I'm 75% sure that the answer is A, but not a 100. You might want to wait until you get more answers.

yan [13]3 years ago

4 0

The answer is C

The reason is that it starts off at 78 but then changes into 788 then 7888. Hope this helps!

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The first row of seats in Section G of a baseball stadium has 5 seats . There is a total of 20 rows of seats in the section . If

RoseWind [281]

Answer:

140

Step-by-step explanation:

8 0

3 years ago

Help me please I don’t know how to

Irina-Kira [14]

Answer:

A: 22

Step-by-step explanation:

2The interquartile range begins at 45 and ends at 67. All you need to do is subtract 45 drom 67, and you get 22.

4 0

2 years ago

Darren wants to estimate the mean age in a population of trees. He'll sample nnn trees and build a 90\%90%90, percent confidence

Alchen [17]

Using the z-distribution, as we have the standard deviation for the population, it is found that the smallest sample size required to obtain the desired margin of error is of 77.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm z\frac{\sigma}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

z is the critical value.

n is the sample size.

$\sigma$ is the standard deviation for the population.

The margin of error is given by:

$M = z\frac{\sigma}{\sqrt{n}}$

In this problem, we have that the parameters are given as follows:

$M = 3, z = 1.645, \sigma = 16$ .

Hence, solving for n, we find the sample size.

$M = z\frac{\sigma}{\sqrt{n}}$

$3 = 1.645\frac{16}{\sqrt{n}}$

$3\sqrt{n} = 1.645 \times 16$

$\sqrt{n} = \frac{1.645 \times 16}{3}$

$(\sqrt{n})^2 = \left(\frac{1.645 \times 16}{3}\right)^2$

$n = 76.97$

Rounding up, the smallest sample size required to obtain the desired margin of error is of 77.

More can be learned about the z-distribution at brainly.com/question/25890103

4 0

2 years ago

(PLEASE HELP!!) A school’s toilets are broken. Don’t Flush Plumbing Company ™ charges $50 for a service call plus $10 per hour.

mr Goodwill [35]

X is your per hour y is the answer itself

Don’t Flush is y= 10x + 50
Fire hole is y= 5x + 90

5 0

3 years ago

Can someone please help me and write the answer out and use demos

Elden [556K]

Answer:

I think that's right not 100% but hope it helps? xx

6 0

3 years ago