Order the fractions from least to greatest -2/5, -7/4, -3/5, -8/3

Mathematics

2 answers:

evablogger [386]3 years ago

7 0

Answer:

-8/3, -7/4, -3/5, -2/5

Step-by-step explanation:

Alenkasestr [34]3 years ago

6 0

Answer:

-8/3, -7/4, -3/5, -2/5

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The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least five years without needing a

Leya [2.2K]

Answer: (0.665 , 0.777)

Step-by-step explanation:

Given : Sample size of consumers: n=420 ;

Number of consumers say their ColorSmart-5000 television sets did not need a repair=303

The the sample proportion for consumers say their ColorSmart-5000 television sets did not need a repair : $\hat{p}=\dfrac{303}{420}\approx0.721$

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

Critical value = $z_{\alpha/2}=\pm2.576$

The confidence interval for population proportion is given by :_

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

i.e. $0.721\pm (2.576)\sqrt{\dfrac{0.721(1-0.721)}{420}}$

$\approx0.721\pm 0.056=(0.721-0.056,0.721+0.056)\\\\=(0.665\ ,\ 0.777)$

Hence, a 99 percent confidence interval for the proportion of all ColorSmart-5000 television sets that have lasted at least five years without needing a single repair = (0.665 , 0.777)

7 0

3 years ago

At the movie theater child admission is 6000 and $.30 an adult mission is $9.60 on Wednesday 172 tickets were sold for a total s

jasenka [17]

Answer:

The number of child tickets sold was 75 and the number of adult tickets sold was 97

Step-by-step explanation:

<u><em>The correct question is</em></u>

At the movie theater child admission is $6.30 an adult admission is $9.60 on Wednesday 172 tickets were sold for a total sales of $1403.70 How many child tickets and adult tickets were sold that day?

Let

x ----> number of child tickets sold

y ----> number of adult tickets sold

we know that

$x+y=172$ ----> equation A