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Mathematics
Study Set
College Algebra
Quiz 7: Analytic Geometry
Path 4
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Question 81
Multiple Choice
Solve the problem. -The path of a comet can be modeled by the equation
x
2
(
1
,
169.7
)
2
ā
y
2
(
26
)
2
=
1
\frac { x ^ { 2 } } { ( 1,169.7 ) ^ { 2 } } - \frac { y ^ { 2 } } { ( 26 ) ^ { 2 } } = 1
(
1
,
169.7
)
2
x
2
ā
ā
(
26
)
2
y
2
ā
=
1
where x and y are measured in AU (astronomical units) . Determine the distance (in AU) at perihelion. Round to one decimal place.
Question 82
Multiple Choice
Solve the problem. - Radio signals emitted from points (10, 0) and (-10, 0) indicate that a plane is 8 miles closer to (10,0) than to (-10, 0) . Find an equation of the hyperbola that passes through the plane's location with foci (10, 0) and (-10, 0) . All units are in miles. Radio signals emitted from points (0, 8) and (0, -8) indicate that a plane is 4 miles farther from (0, 8) than (0, -8) . Find an equation of the hyperbola that passes through the plane's location with foci (0,8) and (0, -8) . From the figure, the plane is located in the fourth quadrant of the coordinate system. Solve the system of equations defining the two hyperbolas for the point of intersection in the fourth quadrant. This is the location o the plane. Round the coordinates to the nearest tenth of a mile.
Question 83
Short Answer
Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -Given
y
2
=
4
p
x
y ^ { 2 } = 4 p x
y
2
=
4
p
x
with p < 0, the parabola opens (upward/downward/ left/right).
Question 84
Short Answer
Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -A is the set of all points in a plane that are equidistant from a fixed line (called the________) and a fixed point (called the________ ).
Question 85
Multiple Choice
Find the standard form of the equation of the ellipse or hyperbola shown. -
Question 86
Short Answer
Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -If the directrix is horizontal, then the parabola opens (horizontally/vertically).
Question 87
Short Answer
Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -Given a parabola defined by
y
2
=
4
p
x
y ^ { 2 } = 4 p x
y
2
=
4
p
x
, the directrix is given by
x
=
ā
p
x = - p
x
=
ā
p
and the focus is given by the ordered pair .
Question 88
Short Answer
Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -The length of the latus rectum is called the________ diameter.
Question 89
Short Answer
Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -The standard form of an equation of a parabola with vertex (0, 0) and vertical axis of symmetry is________ .