Adolphin is 9 feet below the surface of the ocean. if its position can be recorded as −9 feet, what would the position of 0 represent?

the distance above the surface of the ocean
the distance below the surface of the ocean
the height of the dolphin
the surface of the ocean
asap i gotta pass this test or i fail

You are choosing between two health clubs. club a offers membership for a fee of $ 28 plus a monthly fee of $ 20. club b offers membership for a fee of $ 20 plus a monthly fee of $ 22. after how many months will the total cost of each health club be the same? what will be the total cost for each club? in __ months the total cost of each health club will be the same.