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3 years ago

HELPPPPPPPP!!!!!!!!!!!!

Mathematics

2 answers:

katovenus [111]3 years ago

8 0

Answer:

A) True

Step-by-step explanation:

The x values, 1 2 3 can go to the y values B L A

However, if there were two lines at 2 1 2 3 going to any of the y values it would not be a function

Here is a picture explaining it.

iris [78.8K]3 years ago

8 0

Answer:

The answer is True or you could say jast A

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12,20,28,36 are all multiples of 1, 2 and what?

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4 years ago

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In 2009 a survey of Internet usage found that 79 percent of adults age 18 years and older in the United States use the Internet.

Alex777 [14]

Answer:

$0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}$

Option d.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

79 percent of adults age 18 years and older in the United States use the Internet.

This means that $\pi = 0.79$

98% confidence level

So $\alpha = 0.02$ , z is the value of Z that has a pvalue of $1 - \frac{0.02}{2} = 0.99$ , so $Z = 2.33$ .

Which of the following should be used to find the sample size (n) needed?

We have to find n for which $M = 0.025$

So the equation is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}$

Option d.

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3 years ago

Find the volume of a right circular cone that has a height of 15.2 m and a base with a radius of 16.2.Round your answer to the n

AURORKA [14]

Answer:V≈4177.36m³

Step-by-step explanation:

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3 years ago