1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 A small-to medium-capacity dehumidifier (11-25 pints) for a living room can run around $100-$250 or more, depending on size and features such as a humidistat to set the desired humidity, auto-shut-off when the tank's full, energy efficiency and quiet operation.
Letâs take a standard model that operates at 280 Watts-hour. If the current power rate is 15 cents/kW, an electric dehumidifier uses 4.2 cents of power per hour. Therefore, if you run it for 10 hours a day, the cost is 10 hours * 4.2 cents = 42 cents/day or about $153.30 per year.Of course, the calculations shown above are based on approximate figures but they give a good illustration of the operating costs.herefore, if you run it for 10 hours a day, the cost is 10 hours * 4.2 cents = 42 cents/day or about $153.30 per year. Of course, the calculations shown above are based on approximate figures but they give a good illustration of the operating costs.