Contestants in a long distance race run 5 kilometers due south. the runners then turn right and head west towards the finish line. if the straight line distance from start to finish is 13 kilometers, what is the distance that the contestants traveled while heading west?

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?