SOLUTION: Find an equation in standard form for the ellipse with the vertical major axis of length 18 and minor axis of length 10. choices below A.x squared divided by nine plus y squa

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Question 1136091: Find an equation in standard form for the ellipse with the vertical major axis of length 18 and minor axis of length 10.
choices below

A.x squared divided by nine plus y squared divided by five = 1

B.x squared divided by five plus y squared divided by nine = 1

C.x squared divided by twenty five plus y squared divided by eighty DISABLED_event_one= 1

D.x squared divided by eighty one plus y squared divided by twenty five = 1

Answer by MathLover1(20850) About Me  (Show Source):
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Vertical will mean we will look for the larger denominator value under the y%5E2 term.
=>major axis of length: 2a=18=>a=9
=>minor axis of length:2b=10=>b=5
x%5E2%2Fb%5E2+%2B+y%5E2%2Fa%5E2+=+1
x%5E2%2F25+%2B+y%5E2%2F81+=+1+

C.x squared divided by twenty five plus y squared divided by eighty DISABLED_event_one= 1