Carbon monoxide (CO) combines with the hemoglobin of the blood to form carboxyhemoglobin (COHb), which reduces transport of oxygen to tissues. Smokers routinely have a 4% to 6% COHb level in their blood. The quadratic model T = 0.00787 x 2 − 1.528 x + 75.89 approximates the exposure time in hours necessary to reach this 4% to 6% level, where 50 ≤ x ≤ 100 is the amount of carbon monoxide present in the air in parts per million (ppm). (a) A kerosene heater or a room full of smokers is capable of producing 50 ppm of carbon monoxide. How long would it take for a nonsmoking person to start feeling the above symptoms and to round to the nearest tenth. (b) The carbon monoxide concentration necessary for a person to reach the 4% to 6% COHb level in 3 hr and to round to the nearest tenth.

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Chapter 1.5, Problem 45E

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Carbon monoxide (CO) combines with the hemoglobin of the blood to form carboxyhemoglobin (COHb), which reduces transport of oxygen to tissues. Smokers routinely have a 4% to 6% COHb level in their blood. The quadratic model T=0.00787x2−1.528x+75.89 approximates the exposure time in hours necessary to reach this 4% to 6% level, where 50≤x≤100 is the amount of carbon monoxide present in the air in parts per million (ppm).

(a) A kerosene heater or a room full of smokers is capable of producing 50 ppm of carbon monoxide. How long would it take for a nonsmoking person to start feeling the above symptoms and to round to the nearest tenth.

(b) The carbon monoxide concentration necessary for a person to reach the 4% to 6% COHb level in 3 hr and to round to the nearest tenth.

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