Exam 61: Ellipses

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Select the graph for following equation.​ (x−2)216+(y+1)2=1\frac { ( x - 2 ) ^ { 2 } } { 16 } + ( y + 1 ) ^ { 2 } = 1 ​

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Find the standard form of the equation of the ellipse with vertices (0,±9)( 0 , \pm 9 ) and eccentricity e=39e = \frac { 3 } { 9 } .

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Identify the conic by writing the equation in standard form.​ 18y2−24x2+216y+336x−543=018 y ^ { 2 } - 24 x ^ { 2 } + 216 y + 336 x - 543 = 0 ​

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Find the standard form of the equation of the ellipse with the given characteristics. ​ Center: (0,4)( 0,4 ) ;a = 2c;Vertices: (−8,8),(8,8)( - 8,8 ) , ( 8,8 ) ,where a - thr semimajor axis,b - semiminor axis and c2=a2−b2c ^ { 2 } = a ^ { 2 } - b ^ { 2 } . ​

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Find the standard form of the equation of the ellipse with the given characteristics. ​ Foci: (7,−7),(7,−1)( 7 , - 7 ) , ( 7 , - 1 ) ,endpoints of the major axis: (7,−13),(7,5)( 7 , - 13 ) , ( 7,5 ) ​

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Find the standard form of the equation of the ellipse with the given characteristics and center at the origin. ​ Vertices: (±7,0)( \pm 7,0 ) ;Foci: (±5,0)( \pm 5,0 ) ​

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Select the graph for following equation.​ x225+y216=1\frac { x ^ { 2 } } { 25 } + \frac { y ^ { 2 } } { 16 } = 1 ​

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Identify the conic as a circle or an ellipse then find the center.​ x249+y249=1\frac { x ^ { 2 } } { 49 } + \frac { y ^ { 2 } } { 49 } = 1 ​

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The first artificial satellite to orbit Earth was Sputnik I (launched by the former Soviet Union in 1957).Its highest point above Earths surface was 943 kilometers,and its lowest point was 211 kilometers (see figure).The center of Earth was at one focus of the elliptical orbit,and the radius of Earth is 6392 kilometers.Find the eccentricity of the orbit.Round your results to four decimal place.​  The first artificial satellite to orbit Earth was Sputnik I (launched by the former Soviet Union in 1957).Its highest point above Earths surface was 943 kilometers,and its lowest point was 211 kilometers (see figure).The center of Earth was at one focus of the elliptical orbit,and the radius of Earth is 6392 kilometers.Find the eccentricity of the orbit.Round your results to four decimal place.​   ​  x = 211 \mathrm {~km} , y = 943 \mathrm {~km}  ​ ​ x=211 km,y=943 kmx = 211 \mathrm {~km} , y = 943 \mathrm {~km} ​

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Find the Foci of the conic.​ x216+y264=1\frac { x ^ { 2 } } { 16 } + \frac { y ^ { 2 } } { 64 } = 1 ​

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Find the standard form of the equation of the ellipse with vertices (±9,0)( \pm 9,0 ) and eccentricity e=79e = \frac { 7 } { 9 } .

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Identify the conic by writing the equation in standard form.​ 4x2+9y2+40x+54y+145=04 x ^ { 2 } + 9 y ^ { 2 } + 40 x + 54 y + 145 = 0 ​

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Find the standard form of the equation of the ellipse with the given characteristics and center at the origin. ​ Vertical major axis passes through the points (0,7) and (5,0)( 0,7 ) \text { and } ( 5,0 ) . ​

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Find the center and vertices of the ellipse.​ x264+y236=1\frac { x ^ { 2 } } { 64 } + \frac { y ^ { 2 } } { 36 } = 1 ​

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Identify the graph of the following ellipse.​ x236+y24=1\frac { x ^ { 2 } } { 36 } + \frac { y ^ { 2 } } { 4 } = 1 ​

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Find the center and vertices of the ellipse.​ x2+4y2−6x+8y+9=0x ^ { 2 } + 4 y ^ { 2 } - 6 x + 8 y + 9 = 0 ​

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Select the graph for following equation.​ x29+y2=1\frac { x ^ { 2 } } { 9 } + y ^ { 2 } = 1 ​

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Any sound from one focus of an ellipse reflects off the ellipse directly back to the other focus.This property explains whispering galleries such as Statuary Hall in Washington,D.C.The whispering gallery shown in illustration has the shape of a semi-circle.Find the distance sound travels as it leaves focus F and returns to focus F'.Round your answer to one decimal place,if necessary.​ Any sound from one focus of an ellipse reflects off the ellipse directly back to the other focus.This property explains whispering galleries such as Statuary Hall in Washington,D.C.The whispering gallery shown in illustration has the shape of a semi-circle.Find the distance sound travels as it leaves focus F and returns to focus F'.Round your answer to one decimal place,if necessary.​   ​ ​

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Find the eccentricity of the ellipse.​ x264+y281=1\frac { x ^ { 2 } } { 64 } + \frac { y ^ { 2 } } { 81 } = 1 ​

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Find the center and foci of the ellipse.​ (x+1)27+(y−5)216=1\frac { ( x + 1 ) ^ { 2 } } { 7 } + \frac { ( y - 5 ) ^ { 2 } } { 16 } = 1 ​

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