Cardiac output is the volume (cubic centimeters) of blood pumped by a person’s heart each minute. One way of measuring cardiac output C is by Fick’s formula

where x is the concentration of carbon dioxide in the blood entering the lungs from the right side of the heart and a and b are positive constants. If x is measured as x = c with a maximum error of 3%, what is the maximum percentage error that can be incurred by measuring cardiac output with Fick’s formula? (Your answer will be in terms of a, b, and c.)

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C = a x - b