Find the distance between the foci of the hyperbola
\[\frac{y^2}{18} - \frac{x^2}{2} = 1.\]
Question:
Find the distance between the foci of the hyperbola
\[\frac{y^2}{18} - \frac{x^2}{2} = 1.\]
Answer:
Let's think step by step.

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4 \sqrt{5}
Find the distance between the foci of the hyperbola
\[\frac{y^2}{18} - \frac{x^2}{2} = 1.\]
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