
To find:
(a) An equation that models the total ventilation V (in cubic feet per hour) necessary for a classroom with x students.
(b) The number of air exchanges per hour (A) are necessary to keep the room properly ventilated, if x students are in a classroom having volume 15,000 ft3.
A common unit of ventilation is air change per hour (ach). One ach is equivalent to exchanging all the air in a room every hour.
(c) The necessary number of ach (A) if the classroom has 40 students in it.
(d) In heavy smoking areas like bars and lounges the factor by which the ventilation should be increased
In heavy smoking areas, the ventilation rate should be increased to 50 ft3 per min per person compared to classrooms.
According to the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE), a nonsmoking classroom should have a ventilation rate of 15 ft3 per min for each person in the room.

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Chapter 1 Solutions
Essentials of College Algebra (12th Edition)
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