jessica, Liz and Carla are going on a 200 mile road trip. their vehicle acreages 20 mpg. Gasoline coast 1.98 a gallon. of the girls split the cost of gas evenly, approximately how much will each girl pay.

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?