Indoor Air Pollution Formaldehyde is an indoor air pollutant formerly found in plywood, foam insulation, and carpeting. When concentrations in the air reach 33 micrograms per cubic foot (μg/ft3 ), eye irritation can occur. One square foot of new plywood could emit 140 mg per hr. (Source: A. Hines, Indoor Air Quality & Control.)
(a) A room has 100 ft2 of new plywood flooring. Find a linear equation F that computes the amount of formaldehyde, in micrograms, emitted in x hours.
(b) The room contains 800 ft3 of air and has no ventilation. Determine how long it would take for concentrations to reach 33 μg/ft3 .
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