Answer:
A) 48 in : initial height of the water
B) 40.5 in : height of the water after 5 days
C) 32 days
D) Yes, should be restricted.
Domain: 0 ≤ d ≤ 32
Step-by-step explanation:

A)

48 in is the initial height of the water
B)

40.5 in is the height of the water after 5 days
C) when the pool is empty, h = 0.
So set the equation to zero and solve for d.

D) Yes, the domain should be restricted because when d > 32, h < 0 and the height of the water in the pool cannot be negative
Domain: 0 ≤ d ≤ 32
Answer:

Step-by-step explanation:
we have

step 1
Solve the numerator of the quotient

step 2
substitute in the original expression


step 3
simplify

Here's the answer, using the quadratic formula
12.5 ft is the length of 1 mm
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Hope it helps.
Do comment if you have any query.