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 Dehumidifier capacity is generally measured by how many pints of water a unit removes from the air in 24 hours. 2  A mini-dehumidifier (1-10 pints) for a bathroom, closet or under a counter usually costs $40-$70.
1 If you have gutters, extend the downspouts. 2  Simple above-ground extensions of 3-25 feet are $10-$50 each. 3  Extending downspouts into underground drainage pipes or a drywell can cost $100-$400 for do-it-yourself materials and $200-$2,000 or more with professional installation. Large-capacity, low-maintenance dehumidifiers for extremely damp or large basements start around $800-$1,200. 2  Installing a sump pump runs$100 -$300 for do-it-yourself installation in a typical family home, or $250-$600 for both parts and labor to have a plumber or waterproofing contractor install it for you.