this is pre calc arithmetic sequence. AT sea lvl pressure is 14.7 psi. It increases by 14.7 at every 30 ft descent. What is pressure at 1000 ft.

Answer 1

p = pressure

d = depth

p = 14.7 + 14.7 ( d / 30 ) =

14.7 ( 1 + d / 30 )

In this case d = 1000 ft

p = 14.7 ( 1 + 1000 / 30 ) =

14.7 ( 1 + 33.33 ) =

14.7 * 34.33 = 504.7 psi