Answer:
B
Step-by-step explanation:
Answer:
48
Step-by-step explanation:
9x+12=5x+4
9x-5x=12-4
4x=8
x=8/4
x=2
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