Answer: 3,840
8000 * 4 * 12 = 384,000
384,000 / 100 = 3.840
X∈{-3,-2,1}, as there are only points, only certain set numbers can be included within the domain
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STEP 1: 6 1/4 = 6.25
STEP 2: 64*6.25% = 4 (64*6 1/4 = 4 as well).
STEP 3: 64 - 4 = 60
60 gallons of gas remained in the tank.
Solution-

Equating the denominator to 0,
⇒ (x+3)(x+1) = 0
⇒ x= -3, -1
∴ Discontinuities of the function f(x) is at -3, -1
As (x+3) is also a factor of the numerator, you will have what's called a removable discontinuity. That will show up as a hole in the graph.
∴ At x = -3, you will have removable discontinuity.
Parenthesis first, (4*8)= 32 * 7n = 224n