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3 years ago

A line is drawn on a coordinate grid by the equation y = 4. Which of the following lines would represent a row parallel to it?

Mathematics

1 answer:

marissa [1.9K]3 years ago

6 0

Answer:

y=0

Step-by-step explanation:

bc if you graph y=0 its parallel to y=4

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How do I write a comparison sentence for 27=3x9?

adelina 88 [10]

9x3=27 or 27=9x3 well its both

4 0

3 years ago

HELP QUICK!!!! NOW!!!!

inessss [21]

Answer: B. 2,448π units³

Step-by-step explanation:

We will use the formula for the volume of a cylinder to solve.

(<em>The formula, put simplify, finds the area of the base circle and multiples by the height.</em>)

V = πr²h

V = π(12)²(17)

V = (144)(17)π

V = 2,448π

The volume is 2,448π units³ which is option B for your problem.

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2 years ago

Read 2 more answers

Nitrates are groundwater contaminants derived from fertilizer, septic tank seepage and other sewage. Nitrate poisoning is partic

o-na [289]

Answer:

a) $n=\frac{0.5(1-0.5)}{(\frac{0.02}{1.96})^2}=2401$

And rounded up we have that n=2401

b) $n=\frac{0.07(1-0.07)}{(\frac{0.02}{1.96})^2}=625.22$

And rounded up we have that n=626

And we see that if we have previous info about p the sample size varies a lot.

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".

Solution to the problem

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:

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

Part a

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)

And on this case we have that $ME =\pm 0.02$ and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}$ (b)

Since we don't have prior information about the population proportion we can use ase estimator $\hat p =0.5$ . And replacing into equation (b) the values from part a we got: