23. A 20-in. satellite dish for a television has parabolic cross sections. A coordinate system is chosen so that the vertex of a cross section through the center of the dish is located at (0, 0). The equation of the parabola is modeled by x² = 25.2y, where x and y are measured in inches. -10 10 a. Where should the receiver be placed to maximize signal strength? That is, where is the focus? (See Example 1) b. Determine the equation of the directrix.

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter79: Computing Compound Angles On Cutting And Forming Tools
Section: Chapter Questions
Problem 4A
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23. A 20-in. satellite dish for a television has parabolic
cross sections. A coordinate system is chosen so that
the vertex of a cross section through the center of the
dish is located at (0, 0). The equation of the parabola
is modeled by x² = 25.2y, where x and y are measured
in inches.
-10
10
a. Where should the receiver be placed to maximize
signal strength? That is, where is the focus?
(See Example 1)
b. Determine the equation of the directrix.
Transcribed Image Text:23. A 20-in. satellite dish for a television has parabolic cross sections. A coordinate system is chosen so that the vertex of a cross section through the center of the dish is located at (0, 0). The equation of the parabola is modeled by x² = 25.2y, where x and y are measured in inches. -10 10 a. Where should the receiver be placed to maximize signal strength? That is, where is the focus? (See Example 1) b. Determine the equation of the directrix.
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