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3 years ago

What conic section degenerates into a line?

Mathematics

1 answer:

andrew11 [14]3 years ago

5 0

<h3>Answer: A) parabola</h3>

Some degenerate parabola cases form a single straight line, while other cases form one pair of parallel lines.

A degenerate hyperbola forms two lines that intersect at the vertex of the cone. We can rule out choice B.

A degenerate circle is a single point, so we can rule out choice C.

A degenerate ellipse is also a single point. Any circle is an ellipse (but not the other way around). We can rule out choice D.

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how many students must be randomly selected to estimate the mean weekly earnings of students at one college? we want 95% confide

GREYUIT [131]

The sample of students required to estimate the mean weekly earnings of students at one college is of size 96.04.

For the population mean (μ) , we have the (1 - α)% confidence interval as:

X ± Zₐ / 2 + I / √n

margin of error = MOE = Zₐ / 2 ×I / √n

We are given:

σ = $10

MOE = $2

The critical value of z for 95% confidence level is

Zₐ / 2 = Zₓ = 1.96 ( for x as 0.025)

n = (1.96 (10))²

n = 96.04

Thus, the sample of students required to estimate the mean weekly earnings of students at one college is of size, 96.04.

Learn more about estimation here:

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7 0

1 year ago

Read 2 more answers

Anyone know the answers?? Please help?

Murljashka [212]

24. C
25. D

I honestly don't know.

4 0

3 years ago

6 (-3+1) =5 (-2m-2) plz help me ;-----------------------------;

BigorU [14]

I think the answer is m=1/5

4 0

2 years ago

Use the formula L= 10 log 10 R, where Is the loudness of a sound and R is the sound's relative intensity. to find out how much l

WINSTONCH [101]

Answer:

$X=24.1decibels$

Step-by-step explanation:

From the question we are told that:

Loudness function $L= 10 log_{10} R$

Sound of a person $S_p=80\ decibels\ or 10^8$

Number of persons talking $n=20 people$

Generally the Relative intensity for 20 people is mathematically given by

Relative intensity for $R_{20}=$ $20*10^8$

Relative intensity for $R_{20}=$ $20^8$

Generally the loudness for 20 people is mathematically given by

$L_{20}= 10 log_{10} R$

$L_{20}= 10 log_{10} 20^8$

$L_{20}= 10 (8 log_{10} 20)$

$L_{20}= 104.1 decibels$

Therefore increase in loudness X is given as

$X=104.1-80=-52.90$

$X=24.1decibels$

5 0

2 years ago

-4-3 (6x + 9) = 41?<br> Explain what to do first and what is the answer

lara31 [8.8K]

Answer:

x = -2

Step-by-step explanation:

- 3 x - 6x = -18x

- 4 - 18x + 9 = 41

9 - 4 = 5

- 18x + 5 = 41

- 18x = 41 - 5

- 18x = 36

36 divided by -18 is -2

8 0

3 years ago