Which is the equation of an ellipse with directrices at x = 14 and foci at (2.0) and (-2, 0)? y²
4
= 1
x2
+
y2
4
16
00*
y?
4
= 1
Ох?у?
= 1
16
4

Step-by-step explanation:

The relationship between the focus, directrix, and semi-major axis is ...

  foci are ±ae

  directrices are ±a/e

where "a" is the length of the semi-major axis and e is the eccentricity.

Using the given focus and directrix locations, we have ...

  ae = 2

  a/e = 4

When we multiply these equations, we have ...

  (ae)(a/e) = (2)(4)

  a^2 = 8

This is the denominator of the x^2 term in the equation for an ellipse:

  x^2/a^2 + y^2/b^2 = 1

_____

We can find b^2 from ...

  ae = √(a^2 -b^2)

  b^2 = (a^2 -(ae)^2) = 8 -2^2 = 4

So, our ellipse equation is ...

  x^2/8 +y^2/4 = 1 . . . . . . matches the first choice

median is the value separating the higher half of a data sample, a population or probablity distribution from the lower half.

step-by-step explanation:

say you have 3,8,7,3,1,9,8 order them from lowest to highest

if orderd it would be 1,3,3,7,8,8,9 now you take away from the lowest and the highest until you end up in the middle.

so you would remove the 1 and 9 leaving you with 5 digits remaining

when you've reached the middle that would be your answer so in this case the answer is 7

if there were two numbers left say 7 and 5 you'd and them together so 12 then divide by 2 witch would equal 6 so the answer would be 6

good luck on that project hoped i you at all