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. 4R2 = 959n3 In 2012. the company generated revenue of $3? billion. had 132.000 employees. and was adding employees at the rate of 11,000 per year. Find the rate of change of revenue with respect to time. About $|:| billion per year. (Round to the nearest billion as needed.)