The Pressure P Acting at a Point in a Liquid $k = 464$

Multiple Choice

The pressure P acting at a point in a liquid is directly proportional to the distance d from the surface of the liquid to the point. Express P as a function of d by means of a formula that involves a constant of proportionality k. In a certain oil tank, the pressure at a depth of 8 feet is 472. Find the value of k.

A) $k = 464$
B) $k = 59$
C) $k = 55$
D) $k = 51$
E) $k = 3,776$