See the attached figures.
The area of this trapezoid = 576
cm²
When two lines intersect to form a 90 degree angle, these lines are called perpendicular lines.
The function that the naval engineer uses related P (pressure) and d (depth of ocean).
<em>Is there any restriction on the domain ( d: depth of the ocean)? Yes!</em>
The domain would be from 0 (at sea level or 0 depth) until the depth of the ocean (which is not infinite). Hence, we can write:

Choice D is the correct one.
ANSWER: D