I just had this question in an online test I took, and first I had 16ft, but for some unknown reason I chose to change it to 64ft right before I submitted the test, and of course I got it wrong. So I just want to confirm the answer is indeed 16ft.(adsbygoogle = window.adsbygoogle || []).push({});

1. The problem statement, all variables and given/known data

A parabolic antenna has a diameter of 32 feet and is 4 foot deep. How far is the focus from the vertex?

2. Relevant equations

3. The attempt at a solution

My answer - Focus for this parabola is (0, a), so (0, 16) or 16ft from vertex

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# Focus of parabola, checking my answer.

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