Digital ACT Math Practice Question #2072
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
c = sqrt(a^2 - b^2) = sqrt(81 - 32) = 7.
In an ellipse, focal distance c satisfies c^2 = a^2 - b^2 = 81 - 32 = 49. Thus c = sqrt(49) = 7....
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