A 200 gal tank is half full of distilled water. At time = 0, a solution containing 1 Ib/gal of concentrate enters the tank at the rate of 4 gal/min, and the well-stirred mixture is withdrawn at the rate of 2 gal/min. When the tank is full, how many pounds of concentrate will it contain? A 100 pounds B 200 pounds 120 pounds 150 pounds

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.