Apply concepts of density based on area and volume in modeling situations (e.g. persons per square mile BTUs per cubic foot).
Sample Practice Questions (3)
1
A spherical balloon is filled with a gas that has a density of 0.25 kg/m3. If the radius of the balloon is 3 meters, what is the mass of the gas inside the balloon to the nearest tenth of a kilogram?
A circular nature preserve has a radius of 3 miles. A recent survey found that there are approximately 4,500 trees within the preserve. To the nearest whole number, what is the density of trees per square mile?
A developer is purchasing a plot of land shaped like a trapezoid, as shown in the diagram. The purchase price is \$120,000. What is the cost of the land per square foot?