3 years ago

Jennifer bought a printer that cost 240$, there was a 7℅ sales tax on the printer, how much sales tax did Jennifer pay

Mathematics

1 answer:

Viefleur [7K]3 years ago

7 0

The answer is going to be $16.80 i am pretty sure

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ss7ja [257]

Answer: $(13.22\%,\ 19.34\%)$

Step-by-step explanation:

Given : Sample space : n= 559

Sample proportion : $\hat{p}=\dfrac{91}{559}=0.162790697674\approx0.1628$

$=16.28\%$

Significance level : $\alpha= 1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

Confidence level for population proportion:-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.1628\pm (1.96)\sqrt{\dfrac{0.1628(1-0.1628)}{559}}\\\\=0.1628\pm0.030604971367\\\\\approx 0.1628\pm0.0306=(0.1322,\ 0.1934)=(13.22\%,\ 19.34\%)$

Hence, 95% confidence interval for the percentage of all auto accidents that involve teenage drivers.= $(13.22\%,\ 19.34\%)$

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4 years ago

Find the value of x. Justify your answer.

Anna007 [38]

Answer:

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Step-by-step explanation:

Because the figure in the circle is a square, which has the property of possessing equal sides.

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Step-by-step explanation:

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