What is the measure of angle x?

a pair of parallel lines is cut by a transversal. an exterior angle on the left of the transversal is labeled as 45 degrees. an interior angle on the right of the transversal, which is not vertically opposite to the 45 degree angle, is labeled as x.

45 degrees
90 degrees
135 degrees
140 degrees

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?