Use the following to answer question:
Figure 3.21 
-(Figure 3.21) Refer to Figure 3.21 to answer the following questions: 
Definitions:
Density
A physical property defined as the mass of a substance per unit volume, usually expressed in grams per cubic centimeter or kilograms per cubic meter.
Density
The mass per unit volume of a substance, indicating how much matter is packed into a particular space.
Volume
A measurement of the three-dimensional space occupied by an object or a substance.
Q8: The supply curve of rubber balls is
Q19: (Figure 7.15) Complete the following table: <img
Q48: Which of the following statements is (are)
Q57: A small town has 1,000 people, of
Q65: Manny Metal produces 300 tons of sulfur
Q67: (Figure 6.2) Which of the following statements
Q81: Marsha claims that if a consumer is
Q84: The size and direction of the
Q97: (Figure 6.11) Which of the following statements
Q98: (Figure 7.1) At 6 units of output,