All categories

3 years ago

Is 2.45455 irrational or rarional?

Mathematics

2 answers:

-Dominant- [34]3 years ago

5 0

Answer:

irrational

Step-by-step explanation:

Alisiya [41]3 years ago

3 0

Thats going to be an irrational number

You might be interested in

Help!!! <br> Does this graph represent a function?

Cerrena [4.2K]

No because of how the slope is

5 0

3 years ago

Read 2 more answers

Solve -7/3(12s+24)+14=-14

Citrus2011 [14]

Answer:

s = -1

Step-by-step explanation:

-7/3(12s + 24) + 14 = -14

-28s - 56 + 14 = -14

-28s - 42 = -14

-28s = 28

s = -1

8 0

2 years ago

An exam is made of two papers that score differently.

Alborosie

Answer:

Step-by-step explanation:

61%

4 0

2 years ago

Angela works 18 hours a week for 12 weeks in the summer at the local swimming pool as a life guard. She earns $13 per hour. Her

Musya8 [376]

The whole 12 weeks she will make $2,172.

Her employer takes $421.2 for federal income tax.
Her employer takes $174.1 for Social Security.
Her employer takes $40.7 for Medicare.

She makes $181 a week.

6 0

3 years ago

A student wanted to construct a 95% confidence interval for the average age of students in her statistics class. She randomly se

Darina [25.2K]

Answer: (17.42, 20.78)

Step-by-step explanation:

As per given , we have

Sample size : n= 9

$\overline{x}=19.1$ years

Population standard deviation is not given , so it follows t-distribution.

Sample standard deviation : s= 1.5 years

Confidence level : 99% or 0.99

Significance level : $\alpha= 1-0.99=0.01$

Degree of freedom : df= 8 (∵df =n-1)

Critical value : $t_c=t_{(\alpha/2,\ df)}=t_{0.005,\ 8}= 3.355$

The 99% confidence interval for the population mean would be :-

$\overline{x}\pm t_c\dfrac{s}{\sqrt{n}}$

$19.1\pm (3.355)\dfrac{1.5}{\sqrt{ 9}}\\\\=19.1\pm1.6775\\\\=(19.1-1.6775,\ 19.1+1.6775)\\\\=(17.4225,\ 20.7775)\approx(17.42,\ 20.78)$

Hence, the 99% confidence interval for the population mean is (17.42, 20.78) .

7 0

3 years ago