Translate each situation into an equation:
1) janine, who bought $15 worth of make up, spent $6 less than leah spent.
2)rob, who has all 13 girls' phone numbers that are in his homeroom, has 3 more than half the number of girls' phone number that jay has.

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?