You have 45 years left until retirement and want to retire with $4 million. Your salary is paid annually, and you will receive $50,000 at the end of the current year. Your salary will increase at 3 percent per year, and you can earn an annual return of 9 percent on the money you invest. If you save a constant percentage of your salary, what percentage of your salary must you save each year?

Suppose a movie theater determines it can charge different prices to patrons who go to weekday matinees and people who attend evening and weekend shows . the movie theater's goal is to increase total revenue. the price elasticity of demand for weekend and evening patrons is -0.40, and the price elasticity of demand for matinee moviegoers is -1.90. based on the price elasticity of demand for each group of people, how should the movie theater adjust its prices?