(Q4.) A 90 gallon tank contains 50 gallons of water. Water pours in at 4 gallons minute, but
drains out at the rate of 6 gallons per minute.
(a) Write a linear function for the amount of water in the tank after x minutes.
(b) Find the y-intercept and interpret its meaning.
(c) Find the x-intercept and interpret its meaning.
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