AnswersPrecalculusApplications of Conics

Applications of Conics — Quiz Answers

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3

Ailani draws a map of her local town. She places the town hall at the origin of a coordinate plane and represents a lake with a circle drawn on the map. The center of the lake is 19 miles east and 3 miles south of the town hall, and the radius of the lake is 0 point 5 miles. If the positive x -axis represents east and the positive y -axis represents north, which equation represents the lake?

A
open paren x minus 19 close paren squared plus open paren y plus 3 close paren squared is equal to 0 point 5
B
open paren x plus 19 close paren squared plus open paren y minus 3 close paren squared is equal to 0 point 5
C
open paren x minus 19 close paren squared plus open paren y plus 3 close paren squared is equal to 0 point 2 5
D
open paren x plus 19 close paren squared plus open paren y minus 3 close paren squared is equal to 0 point 2 5
4

A mirror is the shape of an ellipse defined by the fraction with numerator y squared and denominator 7 point 2 9 plus the fraction with numerator x squared and denominator 6 point 2 5 is equal to 1 with units in feet. Which statement identifies the orientation of the mirror and its greatest dimension?

A
The mirror has a vertical orientation and is 5 point 4 ft tall.
B
The mirror has a horizontal orientation and is 7 point 2 9 ft wide.
C
The mirror has a vertical orientation and is 7 point 2 9 ft tall.
D
The mirror has a horizontal orientation and is 5 point 4 ft wide.
8

A drone has an effective range represented by a circle on a coordinate plane. The points open paren negative 12 comma 3 close paren and open paren negative 6 comma negative 5 close paren are endpoints of a diameter of this boundary. Which equation represents the effective range boundary for the drone?

A
open paren x minus 9 close paren squared plus open paren y minus 1 close paren squared is equal to 25
B
open paren x plus 9 close paren squared plus open paren y plus 1 close paren squared is equal to 25
C
open paren x plus 9 close paren squared plus open paren y plus 1 close paren squared is equal to 100
D
open paren x minus 9 close paren squared plus open paren y minus 1 close paren squared is equal to 100
9

A pair of radar stations monitors the path of a helicopter. Station A is located at the origin of a coordinate plane. Station B is located 100 miles east of station A. The difference in the distances from the helicopter to each station is 60 miles. Which equation represents the possible locations of the helicopter?

A
the fraction with numerator open paren x minus 50 close paren squared and denominator 900 minus the fraction with numerator y squared and denominator 1 comma 600 is equal to 1
B
the fraction with numerator open paren x minus 100 close paren squared and denominator 900 minus the fraction with numerator y squared and denominator 1 comma 600 is equal to 1
C
the fraction with numerator open paren x minus 100 close paren squared and denominator 3 comma 600 minus the fraction with numerator y squared and denominator 6 comma 400 is equal to 1
D
the fraction with numerator open paren x minus 50 close paren squared and denominator 3 comma 600 minus the fraction with numerator y squared and denominator 6 comma 400 is equal to 1
10

A drone has an effective range represented by a circle on a coordinate plane. The points open paren negative 12 comma 3 close paren and open paren negative 6 comma negative 5 close paren are endpoints of a diameter of this boundary. Which equation represents the effective range boundary for the drone?

A
open paren x plus 9 close paren squared plus open paren y plus 1 close paren squared is equal to 100
B
open paren x plus 9 close paren squared plus open paren y plus 1 close paren squared is equal to 25
C
open paren x minus 9 close paren squared plus open paren y minus 1 close paren squared is equal to 100
D
open paren x minus 9 close paren squared plus open paren y minus 1 close paren squared is equal to 25

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