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.
If your dehumidifier automatically cycles on and off, estimate the amount of time the dehumidifier is actually operating and using energy. For example, a dehumidifier that uses 620 watts and operates for approximately 10 hours each day at $.13 per kilowatt-hour costs $.81 per day to operate.If watts are not provided, this number can be replaced by multiplying the dehumidifier's amperage and voltage ratings.f your dehumidifier automatically cycles on and off, estimate the amount of time the dehumidifier is actually operating and using energy. For example, a dehumidifier that uses 620 watts and operates for approximately 10 hours each day at $.13 per kilowatt-hour costs $.81 per day to operate.