Acompany is setting up offices in two different cities. the number of employees hired by the company for its office in city a over x months is given by the function f(x) = 9x. the number of employees hired by the company for its office in city b over x months is given by the function g(x) = 3(2)x. which function best describes the total number of employees in the company over x months, and after how many months will the total number of employees be 141?