SOLUTION: what is the length of the major axis of an ellipse (x-1)^2/25 + (y+7)^2/81 = 1

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Question 974269: what is the length of the major axis of an ellipse (x-1)^2/25 + (y+7)^2/81 = 1
Answer by lwsshak3(11628) About Me  (Show Source):
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what is the length of the major axis of an ellipse
(x-1)^2/25 + (y+7)^2/81 = 1
This is an equation of an ellipse with vertical major axis
Its standard form: %28x-h%29%5E2%2Fb%5E2%2B%28y-k%29%5E2%2Fa%5E2=1, a>b, (h,k)=coordinates of center
For given ellipse:
a^2=81
a=9
length of the major axis=2a=18