Question

The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola. The microphone itself is placed on the focus of the parabola. If the parabola is 24 inches wide and 4 inches deep, how far from the vertex should the microphone be placed?

Answer 1

@satellite73 can you help me?

Answer 2

@iGreen

Answer 3

@Conqueror

Answer 4

@phi

Answer 5

@shrutipande9

Answer 6

i think @iGreen can help u better..sorry not good in math..if u hv bio problem tag me

Answer 7

Lol

Answer 8

Can you help @iGreen

Answer 9

Hold on, let me see.

Answer 10

ok...

Answer 11

http://openstudy.com/study#/updates/532cb4aee4b0593075e97c02

Answer 12

I'm sorry @iGreen but that doesn't help... that just confused me more (if that's even possible)

Answer 13

@satellite73

Answer 14

@iambatman ...please try to help? I'm so confused..

Answer 15

@bohotness

Answer 16

here LIKE BATWOMANNNNNNNNNNNNNNNNNNN

Answer 17

Haha XD can you help?..

Answer 18

yeeeeeeeeess

Answer 19

okay... well can you walk me through it? please?

Answer 20

yeeeeees

Answer 21

well.... will you?

Answer 22

yes

Answer 23

ok....

Answer 24

yes

Answer 25

Are you going to help?

Answer 26

http://prntscr.com/6cm5ov

Answer 27

clearly, (±12,4) are points on parabola

Answer 28

okay...

Answer 29

how do I find the focus?

Answer 30

our task is to find the Focus of the parabola

Answer 31

yes, I get that. but how?

Answer 32

http://prntscr.com/6cmbe1

Answer 33

how do we find c? c is the distance from the focus and the vertex

Answer 34

waitttt, I plug in an x value and a y value and solve for c, right?

Answer 35

http://prntscr.com/6cmdmy

Answer 36

okay. thanks, i guess

Answer 37

is it 9?

Answer 38

CC