From A to B a private plane flies 2.8 hours at 110 mph on a bearing of 26°. It turns at point B and continues another 2.6 hours at the same speed, but on a bearing of 116° to point C. Round
each answer to three decimal places.

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?