Me a newspaper reports the following changes in the temperature of a city over 4 days: 2.34 degrees celsius, negative 2 over 7 degrees celsius, −0.45 degrees celsius, 3 over 8 degrees celsius write an expression to show the average daily change in the temperature of the city. write the steps to solve the expression. round your answer to the nearest hundredth.

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.