while conducting an audit, an online education company finds that approximately 60% of their business is coming from the top 15% most popular of their courses. a) find the exponent for this pareto-type distribution? b) what fraction of their business comes from the top 2.25% of their courses? c) How many of their courses make up 90% of their business? If they offer a total of 45 courses, and each course accounts for 1.5% of their total budget, are they better off cutting the courses that make up the rest?