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3 years ago

What would be the best way to select a biased sample for the following topic: How far do students at Alpha Elementary jump?

Mathematics

2 answers:

alexira [117]3 years ago

5 0

The answer is A)Randomly choose several students from each grade to test.

Airida [17]3 years ago

3 0

If you're looking for an unbiased answer then you could choose A C or D but a biased selection would be B because you are selecting specific students where as the other options are random selections. if it's not too late choose B!!

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Write the equation of the conic section satisfying the given conditions. focus at the pole, e = 3/4, horizontal directrix 2 unit

hjlf

Answer:

The equation in the polar form is;

$r = \dfrac{6}{4 + 3 \cdot sin(\theta)}$

Step-by-step explanation:

e = 3/4 > 1, we have an hyperbola

The polar equation of a conic is of the form;

For vertical directrix

$r = \dfrac{k \cdot e}{1\pm e \cdot cos (\theta)}$

For horizontal directrix

$r = \dfrac{k \cdot e}{1\pm e \cdot sin(\theta)}$

Where;

k = Distance from the focus to the directrix = 2

We have;

$r = \dfrac{2 \cdot \dfrac{3}{4} }{1 + \dfrac{3}{4} \cdot sin(\theta)}$

$r = \dfrac{\dfrac{3}{2} }{1 + \dfrac{3}{4} \cdot sin(\theta)}$

Which gives the equation in the polar form as follows;

$r = \dfrac{6}{4 + 3 \cdot sin(\theta)}$ .

8 0

3 years ago

18/27=1/3 9/15<4/4 3/4<2/3 5/6>11/12 which is a true statement?

hram777 [196]

Answer:

The correct answer us 9/15<4/4

Can I please have a brainliest? I want to rank up :)

6 0

3 years ago

What is the measure of the missing angle in the figure below?

Aleks [24]

Sum of all interior angles in a triangle = 180
let missing angle = x

x + 144 + 13 = 180
x + 157 = 180
x = 23

answer
23 degrees

7 0

3 years ago

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ASAP HELP 100 POINTS<br> 2 attachments

insens350 [35]

Answer:

the awnser is D

Step-by-step explanation:

i think its D but i would wait for a 2ed awnser

3 0

3 years ago

Trevor was going to the pet store to get a new dog.The store had 56 animals.If 3/7 of them were dogs,how many dogs does this pet

Vladimir79 [104]

The answer to your question is 24

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3 years ago

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