rate at which revenue was generated in billions of dollars per year for one large company can be approximated by the equation below where t 5 corresponds to the year 2005 What was the al revenue generated to the nearest billion between the start of 2005 and 2017 f t 1 321 64t 125 5sts 17 www e a definite integral to find the total revenue generated to the nearest billion between the start of 2005 and 2017