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Ivahew [28]
3 years ago
9

Tiana takes 3 hours to drive to the coast without stopping. How many minutes will it take her to reach the coast if she stops to

rest for 20 minutes?
Mathematics
2 answers:
nika2105 [10]3 years ago
8 0
3 hours is 180 minutes.

She rested for 20 additional minutes, thus it will take her 200 minutes.
Kay [80]3 years ago
4 0
You take 180+20=200 (3hr & 20min)
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F(x) = –22 + 3x + 13<br> Find f(-10)
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Step-by-step explanation:

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3 years ago
If a survey of a movie shows that 50% of all people who like the movie, enjoyed the official movie soundtrack too. If a total of
Murljashka [212]

Answer:

For the first question the sample size is n= 3850

ME= z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

\hat p \pm ME

And replacing we got:

0.5- 0.016 = 0.484

0.5+ 0.016 = 0.516

We are confident at 95% that the true proportion of all people who like the movie is between 0.484 and 0.516.

Step-by-step explanation:

We have the following info given:

\hat p = 0.5 represent the estimated proportion of all people who like the movie

n = 3850 represent the sample size selected

For the first question the sample size is n= 3850

For the second part they gives to us the margin of error:

ME = 0.016

We know that the confidence interval for a population proportion p of interest is given by:

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

And the margin of error is given by:

ME= z_{\alpha/2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

So then the confidence interval can be found with this formula:

\hat p \pm ME

And replacing we got:

0.5- 0.016 = 0.484

0.5+ 0.016 = 0.516

We are confident at 95% that the true proportion of all people who like the movie is between 0.484 and 0.516.

5 0
3 years ago
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