Question

In certain parts of the ocean the pressure of sea water, in pounds per square foot, at a depth of "d" feet below the surface, is given by P=13+ 4d/9

If a scientific team uses special equipment to measure the pressure under water and finds it to be 401 pounds per square foot, at what depth in feet is the team making their measurements?

Answer 1

401=13 + 4d/9
solve for d
d=9/4 (401-13)

Answer 2

Thank you!!