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? ( b. Determine the equation of the directrix.

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter12: Conic Sections
Section12.CT: Chapter Test
Problem 15CT: A parabolic reflector for a car headlight forms a bowl shape that is 6in. wide at its opening and...
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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? (
b. Determine the equation of the directrix.
Transcribed Image Text: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? ( b. Determine the equation of the directrix.
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