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artcher [175]
3 years ago
6

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
Read 2 more answers
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
6 0
3 years ago
Read 2 more answers
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