An entrepreneur in a developing country owns 10 food carts. he has ten employees to work with these food carts. let xi be a random variable representing revenue from cart i (on a particular day), i = 10. xi is approximately normally distributed with mean $35, and variance 64 (squared dollars). revenues of the different carts are independent. how many carts would the entrepreneur have to own in order for the probability to be at least 0.90 that average revenue on a particular day will be between $33 and $37? the cumulative distribution function of a normal random variable is denoted by in this exercise.

If the ceo of a large, diversified, firm were filling out a fitness report on a division manager (i.e., "grading" the manager), which of the following situations would be likely to cause the manager to receive a better grade? in all cases, assume that other things are held constant.a. the division's basic earning power ratio is above the average of other firms in its industry.b. the division's total assets turnover ratio is below the average for other firms in its industry.c. the division's debt ratio is above the average for other firms in the industry.d. the division's inventory turnover is 6, whereas the average for its competitors is 8.e. the division's dso (days' sales outstanding) is 40, whereas the average for its competitors is 30.