document.write( "Question 656908: I'm really stumped on these questions... My teachers gave me examples but I'm not sure how I can apply them into solving these:\r
\n" ); document.write( "\n" ); document.write( "Write the Equation of the ellipse that meet each set of conditions..\r
\n" ); document.write( "\n" ); document.write( "40. The foci are at (3,5) and (1,5) and the ellipse has eccentricity of 0.25\r
\n" ); document.write( "\n" ); document.write( "41. The ellipse has a vertical major axis of 20 units, its center is at (3,0) and e= 7/10 (eccentricity)
\n" ); document.write( "

Algebra.Com's Answer #409786 by lwsshak3(11628)\"\" \"About 
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Write the Equation of the ellipse that meet each set of conditions..
\n" ); document.write( "40. The foci are at (3,5) and (1,5) and the ellipse has eccentricity of 0.25
\n" ); document.write( "41. The ellipse has a vertical major axis of 20 units, its center is at (3,0) and e= 7/10 (eccentricity)
\n" ); document.write( "**
\n" ); document.write( "40. The foci are at (3,5) and (1,5) and the ellipse has eccentricity of 0.25.
\n" ); document.write( "This is an ellipse with horizontal major axis.
\n" ); document.write( "Its standard form of equation: \"%28x-h%29%5E2%2Fa%5E2%2B%28y-k%29%5E2%2Fb%5E2=1\", a>b, (h,k)=(x,y) coordinates of center.
\n" ); document.write( "For given ellipse:
\n" ); document.write( "center: (2,5)
\n" ); document.write( "length of horizontal major axis=2 (1 to 3)=2a
\n" ); document.write( "a=1
\n" ); document.write( "a^2=1
\n" ); document.write( "..
\n" ); document.write( "eccentricity=c/a=.25=1/4
\n" ); document.write( "c=a/4=1/4
\n" ); document.write( "c^2=1/16
\n" ); document.write( "..
\n" ); document.write( "c^2=a^2-b^2
\n" ); document.write( "b^2=a^2-c^2=1-1/16=15/16
\n" ); document.write( "..
\n" ); document.write( "Equation of ellipse:
\n" ); document.write( "\"%28x-2%29%5E2%2F1%2B%28y-5%29%5E2%2F%2815%2F16%29=1\"
\n" ); document.write( "\"%28x-2%29%5E2%2F1%2B16%28y-5%29%5E2%2F15=1\"
\n" ); document.write( "..
\n" ); document.write( "41. The ellipse has a vertical major axis of 20 units, its center is at (3,0) and e= 7/10 (eccentricity)
\n" ); document.write( "This is an ellipse with vertical major axis as stated
\n" ); document.write( "Its standard form of equation: \"%28x-h%29%5E2%2Fb%5E2%2B%28y-k%29%5E2%2Fa%5E2=1\", a>b, (h,k)=(x,y) coordinates of center.
\n" ); document.write( "For given ellipse:
\n" ); document.write( "center: (3,0)
\n" ); document.write( "length of vertical major axis=20=2a
\n" ); document.write( "a=10
\n" ); document.write( "a^2=100
\n" ); document.write( "..
\n" ); document.write( "eccentricity=c/a=7/10
\n" ); document.write( "c=7a/10=7
\n" ); document.write( "c^2=49
\n" ); document.write( "..
\n" ); document.write( "c^2=a^2-b^2
\n" ); document.write( "b^2=a^2-c^2=100-49=51
\n" ); document.write( "..
\n" ); document.write( "Equation of ellipse:
\n" ); document.write( "\"%28x-3%29%5E2%2F51%2By%5E2%2F100=1\"
\n" ); document.write( "
\n" );