Answer 3 and 4 3. Find an equation of a parabola with a vertex at the origin and directrix y=-3.51Oy=-L141Oy= L14Ox= -14Ox=-L,144. 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. the parabola is 40 inches wideand 20 inches deep, how far from the vertex should the microphone be placed?04 inches05 inchesO8 inchesO10 inches

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3. Find an equation of a parabola with a vertex at the origin and directrix y=-3.5 Oy=--x 14 Oy= ? 14 Ox= y 14 Ox=-L 14

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter7: Conic Sections

Section7.1: Parabolas

Problem 3E: The graph of the equation y2=4px is a parabola with focus F(__, __) and directrix x = ____. So the...

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Question

Answer 3 and 4

3. Find an equation of a parabola with a vertex at the origin and directrix y=-3.5
1
Oy=-L
14
1
Oy= L
14
Ox= -
14
Ox=-L,
14
4. 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. the parabola is 40 inches wide
and 20 inches deep, how far from the vertex should the microphone be placed?
04 inches
05 inches
O8 inches
O10 inches

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