Triangles ABC and DEF are being compared. In the triangles, m angle A=45^ , m angle B=45^; m angle D=45^; m angle F=90^ , and AB - DE = 1.5 cm . Are the two triangles congruent?

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?