12) Solve tanx - tanx=0 a) give general solutions b) solve over [0, 2) 13) The formula A = 37.3e-0095t models the population of California, A, in millions, t years after 2010. A) What was California's population in 2010? B) When will California's population reach 40 million people? 14) In 2005, the population of a city was 8.25 million. The exponential growth rate was 3.12% per year. a. Find the exponential growth function. b. In what year will the population reach 12 million? Round to the nearest year. Use the decay model A = Aoe .000121t to answer the following question: 15) Prehistoric cave paintings were discovered in a cave in France. It was determined that the paint contai 15% of the original carbon-14. Estimate the age of the paintings. 16) You invest some money in an account that pays 1.3% interest. If it is compounded continuously, how long will it take for your money to double?