A lamp has the shape of a parabola when viewed from the side. The light source (which is at the focus) is 4 centimeters from the bottom of the lamp and thelamp is 25 centimeters deep. How wide is the lamp?? cm(-а, 25)(a, 25)? cm|(0, 4)25 cm4 cmLight(0, 0)source4 cm25 cmcm A satellite dish has the shape of a parabola when viewed from the side. The dish is 56 inches wide and 49 inches deep. How far is the receiver from the bottomof the dish if the receiver is placed at the focus?y49 in56 in56 in(-28, 49)(28, 49)49 inReceiver? in? in(0, 0)in

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A lamp has the shape of a parabola when viewed from the side. The light source (which is at the focus) is 4 centimeters from the bottom of the lamp and the lamp is 25 centimeters deep. How wide is the lamp? ? cm ? cm «-а, 25) Ma, 25) |(0, 4) 25 cm 4 cm Light ... (0, 0) 4 cm source 25 cm ст

A lamp has the shape of a parabola when viewed from the side. The light source (which is at the focus) is 4 centimeters from the bottom of the lamp and the lamp is 25 centimeters deep. How wide is the lamp? ? cm ? cm «-а, 25) Ma, 25) |(0, 4) 25 cm 4 cm Light ... (0, 0) 4 cm source 25 cm ст

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter11: Topics From Analytic Geometry

Section11.1: Parabolas

Problem 9E

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Concept explainers

Maximization

Have you ever seen a bridge in the shape of a parabola? Where is its maximum on the bridge? The maximum of that bridge is the highest point on that bridge. The process of finding the maximum of the bridge here is called the maximization.

Question

A lamp has the shape of a parabola when viewed from the side. The light source (which is at the focus) is 4 centimeters from the bottom of the lamp and the
lamp is 25 centimeters deep. How wide is the lamp?
? cm
(-а, 25)
(a, 25)
? cm
|(0, 4)
25 cm
4 cm
Light
(0, 0)
source
4 cm
25 cm
cm

A satellite dish has the shape of a parabola when viewed from the side. The dish is 56 inches wide and 49 inches deep. How far is the receiver from the bottom
of the dish if the receiver is placed at the focus?
y
49 in
56 in
56 in
(-28, 49)
(28, 49)
49 in
Receiver
? in
? in
(0, 0)
in

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