A 2-column table with 8 rows. The first column is labeled x with entries negative 3, negative 2, negative 1, 0, 1, 2, 3, 4. The second column is labeled f of x with entries negative 2, 0, 2, 2, 0, negative 8, negative 10, negative 20. Which could be the entire interval over which the function, f(x), is positive?

Solution:

Given that,

The vent is 3.1 miles below the sea's surface

To find: kilometers below the sea's  surface is the vent

From given,

1 kilometer = 0.6214 miles

Use the above conversion factor and convert 3.1 miles to kilometers

From above,

Therefore,

Thus, approximately 5 kilometers, below the sea's  surface is the vent