The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 400 minutes?

The combination of current tax deduction for the employer plus tax deferral for the employee is possible with all of the following types of plans EXCEPT

A) a money purchase B) a savings account C) a stock bonus D) a 401(k)

The majority of the world's population is included in the following economic category:

A) high-income countries. B) upper-middle-income countries. C) lower-middle-income countries. D) low-income countries. E) lower-upper-income countries.