area of triangle abc = 31.8 square units
area of triangle acd = 39.2 square units
area of triangle aed = 35.5 square units
the area of the figure abcde is square units.

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?