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Tpy6a [65]
3 years ago
8

big game world is having a sale on video games this store is offering a sale pack of 4 video game for 43dollars and 80 cents wha

t is the the unit price of a video game in the sale pact part be electronics is also having a sale on video games the unit price of any video game at Roberto's electronics is the same as the unit price of a video game in the sale package of being games were how much would it cost a customer for 7 video games in the electronics store
Mathematics
1 answer:
dangina [55]3 years ago
8 0

4 x U(unit price) = $43.80

U = 43.80 / 4

U = 10.95$

7 x 10.95 = 76.65$

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Alex787 [66]

Answer:

0.45 - 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.287

0.45 + 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.613

And we can conclude at 95% of confidence that the true proportion of interest for this case is between 0.287 and 0.613

Step-by-step explanation:

The estimated proportion of interest is \hat p=0.45

We need to find a critical value for the confidence interval using the normla standard distributon. For this case we have 95% of confidence, then the significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value is:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the true population proportion is interest is given by this formula:  

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

Replacing the values provided we got:

0.45 - 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.287

0.45 + 1.96\sqrt{\frac{0.45(1-0.45)}{36}}=0.613

And we can conclude at 95% of confidence that the true proportion of interest for this case is between 0.287 and 0.613

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3 years ago
How is finding the area of a trapezoid different from finding the area of a parallelogram and a triangle?
trasher [3.6K]
There are different formulas for each different shape.
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$6.89 per pound for salmon OR $3.50 for 8 ounces (half a pound) of salmon
Nastasia [14]

Answer: 6.89 per pound (assuming you meant which is the better deal)

Step-by-step explanation:

There are 16 ounces in a pound so you can multiply, 3.5 x 2 (since it is 3.5 for 8 ounces) to get 7. Therefore $6.89 for a pound is cheaper.

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3 0
3 years ago
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Factorise<br><br>a² - 144<br>Please factorise this​
charle [14.2K]

Answer:

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Step-by-step explanation:

<h2><u>Given Expression</u> :-</h2>

  • \bf\blue{a^{2} - 144}

<h2><u>Steps to factorise</u> :-</h2>

\longrightarrow\:\:\bf\red{a^{2} - 144}

  • Write the number in the exponential form with an exponent of 2

\longrightarrow\:\:\bf\orange{a^{2}-12^{2}}

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\longrightarrow\:\:\bf\purple{(a-12)\times (a+12)}

(<u>Refer the attachment for graph representation</u>)

<h2><u>Graph Details</u> :-</h2>

\bigstar\:\:\bf{y=a^{2}-144}

  • \rm{ Roots \:\:(-12,\:0)\:(12,\:0)}

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  • \rm{Minimum \:\: (0,\:-144)}

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