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Juli2301 [7.4K]
3 years ago
11

Casey buys a bracelet. She pays for the bracelet and pays \$0.72$0.72dollar sign, 0, point, 72 in sales tax. The sales tax rate

is 6\%6%6, percent.
What is the original price of the bracelet, before tax?
\$\$ dollar sign, space
Mathematics
1 answer:
denis23 [38]3 years ago
5 0

Answer:

12dollars

Step-by-step explanation:

so to figure sells tax of 6percent on every dollar you take amount spent say take 20 ×.06 now . 06 is 6percent equals 1.2 so a dollar 20 cents is added to 20 making 21.20 so to find original price you always to opposite of the equation so if sells tax . 72 divide it by .06 and you get 12

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Answer:

0.45 - 1.96 \sqrt{\frac{0.45(1-0.45)}{1000}}=0.419  

0.45 + 1.96 \sqrt{\frac{0.45(1-0.45)}{1000}}=0.481  

And the 95% confidence interval would be given (0.419;0.481).   And the best option would be:

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Step-by-step explanation:

We know the following info:

n = 1000 sample size selected

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The sample proportion would be:

\hat p=\frac{450}{1000}=0.45

The confidence interval would be given by this formula  

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For the 95% confidence interval the value of \alpha=1-0.95=0.05 and \alpha/2=0.025, with that value we can find the quantile required for the interval in the normal standard distribution.  

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And replacing into the confidence interval formula we got:  

0.45 - 1.96 \sqrt{\frac{0.45(1-0.45)}{1000}}=0.419  

0.45 + 1.96 \sqrt{\frac{0.45(1-0.45)}{1000}}=0.481  

And the 95% confidence interval would be given (0.419;0.481).   And the best option would be:

b. .419 to .481

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