What was the percent increase in the population of city k from 1980 to 1990 ? (1) in 1970 the population of city k was 160,000. (2) in 1980 the population of city k was 20 percent greater than it was in 1970, and in 1990 the population of city k was 30 percent greater than it was in 1970.?

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat