Exam 7: Analytic Geometry

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An equation of a parabola (xh)2=4p(yk)( x - h ) ^ { 2 } = 4 p ( y - k ) is given. Graph the parabola. Identify the vertex and the focal diameter. - (x+3)2=4(y+4)( x + 3 ) ^ { 2 } = - 4 ( y + 4 )

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An equation of a parabola is given. Write the equation of the parabola in standard form, and identify the vertex and the focal diameter. - y28y12x8=0y ^ { 2 } - 8 y - 12 x - 8 = 0

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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. 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.

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Solve the problem. -a. A circular vent pipe with diameter 4 inches is placed on a flat roof. Write an equation of the circular cross section that the pipe makes with the roof. Assume the origin is placed at the center of The circle. b. Suppose the pipe is instead placed on a roof with a slope of 34\frac { 3 } { 4 } . The cross-section of the pipe Where it intersects the roof is an ellipse. Determine the lengths of the major and minor axes of this Ellipse.

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An________ is a set of points (x, y) in a plane such that the sum of the distances between (x, y) and two fixed points called________ is a constant.

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The circle, the ellipse, the hyperbola, and the parabola are categories of ________sections.

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -The line segment perpendicular to the transverse axis passing through the center of a hyperbola, and with endpoints on the reference rectangle is called the ________axis.

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -Given (xh)2=4p(yk)( x - h ) ^ { 2 } = 4 p ( y - k ) ), the ordered pairs representing the vertex and focus are________ and________, respectively. The directrix is the line defined by the equation________ .

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Graph the hyperbola. Identify the center and vertices. - x249y264=1\frac { x ^ { 2 } } { 49 } - \frac { y ^ { 2 } } { 64 } = 1

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Graph the ellipse. - x218+y27=1\frac { x ^ { 2 } } { 18 } + \frac { y ^ { 2 } } { 7 } = 1

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Write the word or phrase that best completes each statement or answers the question. Provide the missing information. -The points where a hyperbola intersects the line through the foci are called the ________.

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Given an ellipse with major axis of length 2a and minor axis of length 2b, the area is given by A =ab. The perimeter is approximated by Pπ2(a2+b2)P \approx \pi \sqrt { 2 \left( a ^ { 2 } + b ^ { 2 } \right) } a. Determine the area of the ellipse. b. Approximate the perimeter. - x24+(y6)212=1\frac { x ^ { 2 } } { 4 } + \frac { ( y - 6 ) ^ { 2 } } { 12 } = 1

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Write the equation of the ellipse in standard form. Identify the vertices and foci. - 25x2+y2+14y+24=025 x ^ { 2 } + y ^ { 2 } + 14 y + 24 = 0

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The line through the foci intersects an ellipse at two points called________ .

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Solve the problem. -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=26.4yx ^ { 2 } = 26.4 y where x and y are measured in inches. Where should the Receiver be placed to maximize signal strength? That is, where is the focus?

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Solve the problem. -A planet's moon has an orbit that is elliptical with eccentricity 0.054 and with the planet at one focus. If the distance between the moon and the planet at perihelion (the closest point) is 364,100 Km, determine the distance at aphelion (the farthest point). Round to the nearest 100 km.

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Find the standard form of the equation of the ellipse or hyperbola shown. -Find the standard form of the equation of the ellipse or hyperbola shown. -

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Determine the eccentricity of the ellipse. - (x+4)2144+(y+5)2169=1\frac { ( x + 4 ) ^ { 2 } } { 144 } + \frac { ( y + 5 ) ^ { 2 } } { 169 } = 1

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Solve the problem. -A homeowner wants to make an elliptical rug from a 30-foot by 10-foot rectangular piece of carpeting. a. What lengths of the major and minor axes would maximize the area of the new rug? b. Write an equation of the ellipse with maximum area. Use a coordinate system with the origin at the center Of the rug and horizontal major axis.

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Write the equation of the ellipse in standard form. Identify the vertices and foci. - x2+81y214x32=0x ^ { 2 } + 81 y ^ { 2 } - 14 x - 32 = 0

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