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2 years ago

Which features are present in this polar graph?

1 answer:

8 0

If the graph is this one:http://assets.openstudy.com/updates/attachments/556b7614e4b0ae03fc84336f-haileyjcaroen-1433105982090...
Then the correct features that are present in this polar graph are Symetry about the polar axis= 0 and Symetry about the pole (0,0), so B and C. Hope this helps.

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Vikentia [17]

#1. A- the square would have the greatest perimeter.

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3 years ago

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Determine whether the source given below has the potential to create a bias in a statistical study.A certain medical organizatio

Tpy6a [65]

Answer:

There appears to be statistical bias.

Step-by-step explanation:

There is a likelihood of potential bias in the experiment. This is is because the results can be manipulated so that they can be in line with the organization's objectives and of the funders.

Only verified and quantified surveys are able to provide statistically unbiased results.

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3 years ago

Please help!!<br>The picture of the question is attached...

koban [17]

Answer:

Proved

Step-by-step explanation:

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2 years ago

Solve both questions please ❤️❤️

harina [27]

Answer:

1. y=7.2

2. x=18

Step-by-step explanation:

1. Triangles CMN and CBA are similar triangles (by AAA postulate). Similar triangles have proportional corresponding sides, so

$\dfrac{CM}{CB}=\dfrac{CN}{CA}\\ \\\dfrac{12}{12+y}=\dfrac{10}{10+6}\\ \\12\cdot 16=10\cdot (12+y)\\ \\192=120+10y\\ \\10y=72\\ \\y=7.2$

2. GK is angle G bisector. Use angle bisector's property:

$\dfrac{GH}{GI}=\dfrac{KH}{KI}\\ \\\dfrac{40}{24}=\dfrac{30}{x}\\ \\40x=24\cdot 30\\ \\4x=24\cdot 3\\ \\x=6\cdot 3=18$

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2 years ago

The principal at Riverside High School would like to estimate the mean length of time each day that it takes all the buses to ar

Lilit [14]

Answer:

C) 11

Step-by-step explanation:

1) 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".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that $z_{\alpha/2}=1.64$