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4 years ago

Diagonal cross section of a cylinder A) circle

2 answers:

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Diagonal cross section of a cylinder -----> ellipse

cross section parallel to the base of a cone -----> A) circle

shape created when a semi−circle is rotated about the y−axis -----> D) sphere

diagonal cross section through the widest part of a sphere -----> C) great circle

perpendicular cross section of a cone -----> B) triangle

Kruka [31]4 years ago

6 0

Answer:

1. diagonal cross section of a cylinder - When a cylinder is bisected diagonally is forms a shaped that looks like an eclipse. (this choice is not given though)

2. cross section parallel to the base of a cone - When we cut some figure parallel to its base, it will be same as the base. So, the base of a cone is circle and the answer is circle.

3. shape created when a semi−circle is rotated about the y−axis - When you rotate a semi-circle about its axis it will form a sphere.

4. diagonal cross section through the widest part of a sphere - If a sphere is cut along its widest part it would form a great circle.

5. perpendicular cross section of a cone - when a cone is cut from the vertex to the center of its base, a triangle is formed.

So, here rectangle is the wrong choice given instead of eclipse.

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In the track meet I competed in the high jump and the pole vault. What is this called?

nata0808 [166]

Answer:

Within the parlance of Statistics, this is called Nominal Data.

Other examples of nominal data are:

Race
Country
Gender etc

Cheers

5 0

3 years ago

Please help me! Answer ASAP!

MaRussiya [10]

This would be the Transitive Property of Congruence.

This property of congruence states that if two angles/segments/polygons are both congruent to something else, then they are congruent to each other.

Hope this helps! :)

5 0

3 years ago

In a sample of 230 teenagers, 202 would like to have smaller class sizes at their school. Find the sample

marishachu [46]

Answer:

The sample proportion is 0.88.

The margin of error is of 0.04.

The interval likely to contain the true population proportion is (0.84,0.92).

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

Margin of error:

The margin of error is of:

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

Sample of 230 teenagers, 202 would like to have smaller class sizes at their school.

This means that $n = 230$ , and that the sample proportion is:

$\pi = \frac{202}{230} = 0.88$

The sample proportion is 0.88.

Standard 95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a p-value of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Margin of error:

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

$M = 1.96\sqrt{\frac{0.88*0.12}{230}}$

$M = 0.04$

The margin of error is of 0.04.

Confidence interval:

Sample proportion plus/minus margin of error. So

0.88 - 0.04 = 0.84

0.88 + 0.04 = 0.92

The interval likely to contain the true population proportion is (0.84,0.92).

5 0

3 years ago

A social scientist surveyed a random sample of male musicians at a university about their practice habits. The graph below displ

Arada [10]

Answer:

Step-by-step explanation:

male musicians practice an avg 2/hrs a day

5 0

4 years ago

A certain airplane has two independent alternators to provide electrical power. the probability that a given alternator will fai

LuckyWell [14K]

A certain airplane has two independent alternators to provide electrical power. the probability that a given alternator will fail on a one-hour flight is 0.019.

This is a binomial probability situation, since it's "pass or fail." The prob. of failure is 0.019. Since the alternators are separate and independent, the prob. that two will fail is the product of 0.019 and 0.019, or 3.61 to the power -4 of 10. The latter can also be written as 0.000361.

The probability that one alternator will fail is 1-0.019, or 0.981.
The probability that neither alternator will fail is (0.981)^2=0.9624 (to four decimal place accuracy).

What is the probability that at least one fails? This probability is equal to the complement of the probability that ONE will fail, which on the TI 84 Plus can be calculated as 1-binompdf(2,0.981,0), which comes out to 0.000361.

8 0

4 years ago