## A community for students. Sign up today

Here's the question you clicked on:

## anonymous one year ago What are the foci of the following graph? how do i find that?

• This Question is Closed
1. anonymous

2. Loser66

a=? b=? c^2=a^2-b^2

3. Loser66

|dw:1438653300551:dw|

4. anonymous

The foic lie on the line called the major. This ellipse major is on the x axis. The equation of this ellipse is $$\huge \frac{x^2}{36} +\frac{y^2}{4} = 1$$ The foci is (c, 0) and (-c,0) $$\huge c= \sqrt{36-4}$$ Can you tell us what c equals?

5. anonymous

If you are wondering where I got 36, I got it from starting at (0,0) and counting to my right to the end where the circle meets the x axis, which is 6. Then I $$6^2 = 36$$

6. anonymous

You do the same for the y too

7. anonymous

What does c = ??

8. anonymous

4 sqrt 2?

9. anonymous

Yes correct!!! so your foci are at |dw:1438686871701:dw|

#### Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy