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In 2012, the population of a city was 6.71 million. The exponential growth rate was 1.35% per year. a) Find the exponential growth function. b) Estimate the population of the city in 2018. c) When will the population of the city he 9 million? d) Find the doubling time. a) The exponential growth function is P(t) = Cl, where t is in terms of the number of years since 2012 and P(t) is the population in millions. (Type exponential notation with positive exponents. Do not simplify. Use integers or decimals for any numbers in the equation.) b) The population of the city in 2018 is El million. (Round to one decimal place as needed.) 0) The population of the city will be 9 million in about U years after 2012. (Round to one decimal place as needed.) d) The doubling time is about U years. (Simplify your answer. Round to one decimal place as needed.) Complete the table given below. (Simplify your answers. Do not round until the final answers. Then round to four decimal places as needed.) Radioactive Substance Decay Rate, k Half-Life T a) Polonium % per min 1.8 mins (Po-198) b) Lead % per year 22.3 years (Pb-210) c) lodine 1.15% per day days (1-125) d) Krypton 0.9% per min mins (Kr-87) e) Strontium % per min 106.3 mins (Sr-80) f) Uranium % per min 58.0 mins (U-229) g) Plutonium % per year 6561 years (Pu-240)Use the horizontal line test to determine whether the function is one-to-one. y= Vx +2 Is the function one-to-one? + O Yes O No [- 10, 10, - 10, 10] Xscl = 1, Yscl = 1Use the horizontal line test to determine whether the function is one-to-one. f ( x ) = - x2 +3 Is the function one-to-one? + O Yes O No [- 10, 10, - 10, 10] Xscl = 1, Yscl = 1