I only need to answer 8b and 9a and b

Which of the following best describes the delian problem?

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

#7. m is the midpoint of pq, the diameter of the circle o is 13in. and rm = 4in. find pm find pq