If a firm sells on terms of 2/10 net 30 days, and its dso is 28 days, then the fact that the 28-day dso is less than the 30-day credit period tells us that the credit department is functioning efficiently and there are no past-due accounts. a. true b. false

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?