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2 years ago

Exactly how many planes contain points J, K, and N? 0 1 2 3

Mathematics

1 answer:

Archy [21]2 years ago

6 0

Answer:

Step-by-step explanation:

JK and KN is perpendicular.

Thus no planes contained them except 1

Which is a rectangle.

I hope this helps you :)

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What is the volume of a square pyramid if each side of the base is 18 meters and the height is 12 meters

GarryVolchara [31]

Answer:

What is the volume of a square pyramid if each side of the base is 18 meters and the height is 12 meters?

V=1296

7 0

3 years ago

Which graph represents the function r(x) = |x – 2| - 1

maria [59]

Answer:you diddnt attach a graph but it woul have a stating pooint of positive 3 and a slove of up one over 1 so 1/1 +3

Step-by-step explanation:

5 0

2 years ago

5. If the sample size had been 2,500 registered voters, and the results stated 47% would vote for the Republican governor, and 4

icang [17]

Answer:

If we replace for the proportion estimated for the republican governor we got:

$ME=1.96\sqrt{\frac{0.47 (1-0.47)}{2500}}=0.0196$

And the confidence interval given by:

$0.47-0.0196= 0.45$

$0.47+0.0196= 0.49$

If we replace for the proportion estimated for the democratic chalenger we got:

$ME=1.96\sqrt{\frac{0.45 (1-0.45)}{2500}}=0.0195$

And the confidence interval given by:

$0.45-0.0195= 0.43$

$0.45+0.0195= 0.47$

As we can see both confidence intervals not contain the value 0.5 for the true proportion so then the director cannot said that the election was a toss up at 5% of significance.

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

We assume for this case a confidence of 95%. In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by:

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

The margin of error for the proportion interval is given by this formula:

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

If we replace for the proportion estimated for the republican governor we got:

$ME=1.96\sqrt{\frac{0.47 (1-0.47)}{2500}}=0.0196$

And the confidence interval given by:

$0.47-0.0196= 0.45$

$0.47+0.0196= 0.49$

If we replace for the proportion estimated for the democratic chalenger we got:

$ME=1.96\sqrt{\frac{0.45 (1-0.45)}{2500}}=0.0195$

And the confidence interval given by:

$0.45-0.0195= 0.43$

$0.45+0.0195= 0.47$

As we can see both confidence intervals not contain the value 0.5 for the true proportion so then the director cannot said that the election was a toss up at 5% of significance.

8 0

3 years ago

Becki put some stamps into her stamp collection book.She put 14 stamps on each page.If she completely filled 16 pages,how many s

S_A_V [24]

Answer:

224 Stamps

Step-by-step explanation:

This is a very simple problem!

<em>If each page has 14 stamps, how many stamps would 16 pages have?</em>

It is 14 multiplied by 16.

Hence, total number of stamps = $14*16=224$ stamps

5 0

2 years ago

Read 2 more answers

13. SHOPPING ONLINE Jennifer is purchasing CDs and a new CD player from an online store. She pays $10 for each

Masja [62]

Answer:

x = 50 + 10(CD)

Step-by-step explanation:

CD = 4

x = 50 + 10(4)

x = 50 + 40

x = 90

x = amount spent.

5 0

2 years ago