7- The population of a city is growing at an average rate of 3.5% per year. In 1992, the population was 4200. a) Write an equation that models the growth the of the city. b) Use your equation to determine the population of the city in 2012. c) Determine the year in which the population will have tripled. d) In what month of that year will the population have tripled?

Part 1) According to one mathematical model, the average life expenctancy for American men born in 1900 was 55 years. Life expectancy has increased by about 0.2 year for each birth year after 1900. If this trend continues, for which birth year will the average life expentancy be 75 years? a) Write an equation to model the problem. Let t represent the number of years after 1900. For example, t = 12 would represent the year 1912. Answer:   b) Solve the equation, then answer the question given above. (Note: You are asked for a year, not a value for t.)   Part 2) Wilma drove at an average speed of 50 mi/h from her home in City A to visit her sister in City B. She stayed in City B 25 hours, and on the trip back averaged 35 mi/h. She returned home 48 hours after leaving. How many miles is City A from City B

The average home in Metropolis in 2005 was $235,600. In 2006 it was $257,400. The average home price in Smallville in 2005, was $112,100. In 2006, it was $137,600. If these trends continue, when would Smallville's average home price exceed that of Metropolis? Answer= ____________ (Number of years after 2005; round to the nearest tenth)

Please solve for A or B and the missing values