A fuel oil tank is an upright cylinder, buried so that its circular top is 16 feet beneath ground level. The tank has a radius of 7 feet and is 21 feet high, although the current oil level is only 18 feet deep. Calculate the work required to pump all of the oil to the surface. Oil weighs 50lb/ft^3

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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.