What is the formula for finding the depth of the ocean?

3 answers

Doesn't the depth vary?
I don't know this is just a question on my son's science homework paper?
This may help answer your question; however, we all know that the depth of the ocean changes depending upon where we are in the ocean and how far form land we are.
http://www.swmea.org/newsletter/summer02/SWactivity.pdf