1.5 deep.
you subtract 2.25 of air space from the total depth 3.75
3.75-2.25=1.5
Answer:
You either wrote it down wrong, or there's a graphic to go along with it that you didn't include. There is not enough information to answer this question, sorry.
Answer:

Step-by-step explanation:
→ Substitute in the numbers

→ Simplify

Answer in the document below.
Answer:
Step-by-step explanation: