For a certain company, the relationship between revenue R (in millions) and number of employees n (in thousands) can be approximated by the following equation shown below. 3R2-950n In 2012, the company generated revenue of $37 billion, had 185,000 employees, and was adding employees at the rate of 13,000 per year. Find the rate of change of revenue with respect to time. About 5 billion per year. (Round to the nearest billion as needed.)