Answer:
I think it is 15 Tan^-1 (5÷18)
There is 4 inches of water in the swimming pool before the day started. The rainfall is falling at 3 inches per minute.
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By synthetic division,
q(x) = 4x^2 +5x +15
r(x) = 23
q(x) = 4x^2 +5x +15
r(x) = 23